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my 73 620

Printed From: Datsun Mini Truckin
Category: Datsun Trucks
Forum Name: 620's
Forum Discription: The Bullet
URL: http://www.datsunminitruckin.com/forum/forum_posts.asp?TID=831
Printed Date: 23 Oct 2018 at 6:03pm


Topic: my 73 620
Posted By: datto62073
Subject: my 73 620
Date Posted: 13 Dec 2010 at 7:23am
since i am technically not a "new" member anymore i will continue with my build thread here. and a link to my intro thread  so everyone can see the time line of my build. since i did not have a pic of my truck after i painted it, i found one and here it is. i hope Bleach doesn't mind, since it is my truck. Wink

http://smg.photobucket.com/albums/v422/moparPW200guy/?action=view&current=desmoinespotd2010032.jpg">

but as of last Saturday, i lost the brakes in the truck AGAIN. i think the master cyl went out. thats ok though as i have another car running again. my 93 Passat is going great guns again so i have something at least halfway, ok FULLY, comfortable to drive for work. i will be gathering parts to fix the truck soon but i am really thinking about doing a disk brake swap on it so that might be a while before its fixed to my liking. we shall see though.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)



Replies:
Posted By: Pharouh
Date Posted: 13 Dec 2010 at 5:36pm
Another 73 620!  Don't you just love them?  I have 2 Approve

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You can't have too many Datsuns


Posted By: datto62073
Date Posted: 13 Dec 2010 at 6:35pm
yup! so do i, but i parted my 78 KC to fix this one. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Farmer
Date Posted: 13 Dec 2010 at 7:47pm
Keep us updated with lots of Pics

Larry


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Posted By: datto62073
Date Posted: 13 Dec 2010 at 7:50pm
i'll do what i can Smile

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 01 Apr 2011 at 4:48am
as of right now my 73 is down for brake issues. right front is locked up and i have a feeling i have a bad wheel cyl on that corner. but i am at the point right now that i cant decide if i should do a front disk conversion or just rebuild the drum brakes AGAIN. i kinda need the truck but i hate the fact of having to fight with the brakes all the time. i really should just fix the brakes that are there but finding wheel cyls nowadays is not the easiest thing to do. plus i need to get my slots redone. the chrome is coming off and they are lookin like crap. i have one on a flat which sucks but what ya gonna do right?

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 01 Apr 2011 at 9:23am
The disk conversion seems pretty straight forward and well worth the monies in my opinion, but I have yet to do it.  I'm rebuilding the drum brakes on my 521 but the next time they have to be rebuilt you better believe I'm going disk.

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Posted By: datto62073
Date Posted: 02 Apr 2011 at 5:20pm
that was my thinking. gather parts but i an not entirely sure how i want to go about it. if i want to just get adapter brackets and keep the kingpins or go with custom control arms and use D21 drop spindles. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 11 Jul 2011 at 8:40am
well i decided i was gonna rebuild the front drums AGAIN. i think i have a warped drum, so i am gonna take the rear drums i have off the 78 (new) and put em on. but before i can even think of doing that, i need ot put a new brake line in (both actually), new hardware and i figure i'll throw in some new fluid as well.  it kinda sucks not having much $$ to fix things.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 11 Jul 2011 at 10:22am
yes it does suck, turn the drums if you can, some napa stores will do it cheap, adjust the shoes out properly and you would be suprised how adding new hoses can help.  I have a bunch of front brake parts if you need them.

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 11 Jul 2011 at 4:20pm
the drums on my 78 are new with less than 3000 miles on em. the only reason i am going with those is i cant afford to get a whole lot right now. and the fact that they are new. as for everything else, i would rather go new than used. now if ya have adjusters in good shape, but as said, cant afford a whole lot now.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 16 Jul 2011 at 1:00am
well i got the new shoes on, and a new pass side flex line. i didn't swap drums as the old ones are in good shape. but i figured out what went wrong. last time i worked on the brakes i didn't lube the adjuster slide areas. so it would pivot for the braking but didn't release. now i feel stupid but the idiots that last "looked" at my brakes said everything was fine.... till i had NO brakes. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 16 Jul 2011 at 5:52am
hope u didn't pay money to those idiots that 'looked' at your brakes

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 16 Jul 2011 at 6:09am
nope. thank god. next week, as this weekend is a cluster F, i will be working on the brakes more.. hopefully i can get em working right and dont need more wheel cyls. knowing my luck nowadays i will.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 16 Jul 2011 at 6:17am
sounds like a plan, that's a very good attitude. keep at it and all that hard work will soon pay offThumbs Up 

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 16 Jul 2011 at 7:16pm
That's the plan. I need to get this thing going soon. Hopefully I can get it done soon as well as my wife's Rabbit. I gotta do a head gasket on the bimmer so I need something reliable. I also found a weber rebuild kit so hopefully I can do that as well. It'll be nice to have a working truck again.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 19 Jul 2011 at 12:05am
Cool, glad you've got a solid plan building!  I wish I had half your motivation at the moment!  Keep up the good work, get that bimmer done so you can get back on the datsun!!!  :)  Oh yeah, got my gti home!

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Posted By: datto62073
Date Posted: 20 Jul 2011 at 3:42am
i am workin on the datsun so i can work on the bimmer. love the BMW but my little datto is awesome. it hauls a ton of wood, looks cooler than anything i have ever owned, and even after sitting for MONTHS at a shot, it fires right up and runs like a champ.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 20 Jul 2011 at 3:45pm
That last sentence is actually the definition of Datsun.. LOL

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Posted By: datto62073
Date Posted: 20 Jul 2011 at 7:53pm
that it does!

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 01 Aug 2011 at 2:32am
well i moved the truck into the carport but had a drivers REAR locked up. not fun. no sign of fluid leaks so i might be able to just disassemble and relube the slide points and be done. does anyone have any good rear brake cables for a 72-73 620??? i need one side but cant remember which off hand. i know they changed in 74 and no one carries the older cables anymore.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 01 Aug 2011 at 5:40am
i worked on my brakes this weekend and noticed my 74 brake cables are different than my 76 so i would say it's safe to say they changed in 75 and so did the design of the fuel tanks. the early tanks are indented for clearance of the  passengerside brake line

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 05 Aug 2011 at 6:33am
what fun. the rear shoe ont eh drivers side came apart on me. time for new shoes there too. at this point she'll have new brakes all around, which i was hoping NOT to do until i could afford Beebanis disc brackets or control arms.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 05 Aug 2011 at 11:25pm
+1 for the brackets, which I'm saving up for too!  Group buy beebani?



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Posted By: datto62073
Date Posted: 13 Aug 2011 at 1:21am
havent had time to work on it but i found i was MISSING a couple springs in the rear. yup... new hardware now. FFFFFFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! soon it'll have all new brakes AGAIN! this blows i want disk damnit! 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 13 Aug 2011 at 2:43am
Lame...  When you go discs put your good drum stuff on here for sale!

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Posted By: Braden620
Date Posted: 13 Aug 2011 at 10:58am
ez do you need drum stuff? dude I have my front drums as a whole assembly. need em?

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 13 Aug 2011 at 3:20pm
that was the plan. who knows when i'll swap to disc now as i have no more monies to do so. gotta fix a BUNCH of other stuff before brakes are a concern again.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 13 Aug 2011 at 4:19pm
I know all about that. i have wanted disc brakes since the first day I got my truck and its taken me 2 years to get the truck to the condition it is in now. When you do your brake swap get your stuff from rock auto. I saved a TON of money by doing it that way and I also got quality parts, not some cheap A1 cardone rebuilt junk.

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: smooth620
Date Posted: 13 Aug 2011 at 9:38pm
I agree with Braden. Years ago, i decided immediately to swap to disc after a close call avoiding a rearend collision on a busy freeway. But upgrading or rebuilding a brake system won't guarantee 'better' or 'best' brakes unless the vehicle is driven often. Moisture and condensation is the worst enemy for a brake system using the typical DOT 3 brake fluid. A vehicle that sits for long periods of time even after having new brakes installed will have issues due to water retention (brake fluid attracts moisture).  DOT 4 brake fluid has a lower water rate than DOT 3.
   With that said, the brakes on my '74 improved after i upgraded to front disc, added an NLSV, and overall rebuilt the whole brake system using DOT 4 but i have to confess i drive it only on weekends when possible. Not long ago i had to replace a leaking rear wheel cylinder that had less than 500 miles. Recently, i noticed the front right caliper leaking fluid.

  So, after installing new brakes again, drive it often as possible especially if there's alot of rain or humidity around your location. Drive it in traffic or an area where there's lots of traffic lights to evaporate the moisture in the fluid and to give your brakes a good 'workout'. 

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 14 Aug 2011 at 1:34am
i would be using the OE parts off my 78 KC so most likely the Bees upper arms for the front with new rotors, pads, and whatever else is needed and of course his brackets for the rears. as for driving, it'll be a daily again for me. i miss driving it. i am talking roughly 50+ miles a day. of course a nice brake flush.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 14 Aug 2011 at 6:13am
datto, i know exactly what u are saying. i took out my '74 this morning for a nice 30+ miles cruise and it felt great. it makes u want to keep on driving especially when u notice guys driving muscle cars staring at your truckLOL

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 14 Aug 2011 at 5:04pm
yup! love teh looks i get with my truck. although its beat up, its still a fun truck to drive. hell most of the people i see ask if its an 80s rig. when i tell em its a 73, they just about drop a load.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 16 Aug 2011 at 5:56am
DATTO, i almost dropped a load when i saw your pic of FRAM full synthetic oil...i'm like WTFLOL




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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 28 Aug 2011 at 1:38pm
yeah so did i when i first saw it. but back on track....... IT LIVES!!!!! drove it all over hells half acre the other night and she drove without a hitch. brakes are crap but they at least work now. tomorrow...  dump run

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 28 Aug 2011 at 11:58pm
well, if all else fails be sure to use your handbrake to help u stop especially when hauling a heavy loadTongue

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 29 Aug 2011 at 4:06pm
What handbrake??? It hasn't worked since I have owned it.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: DATSUNREAL
Date Posted: 29 Aug 2011 at 11:45pm
Originally posted by datto62073 datto62073 wrote:

What handbrake??? It hasn't worked since I have owned it.
uuuuuhhhhh datto thats not a good thing ...... aaaaahhhhh keep on truckin !!!!! just brake really really realy early.....Wink


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620 DATSUNREAL

TOO BAD !!!!! WOP YA' JAWS !!!!!


Posted By: datto62073
Date Posted: 31 Aug 2011 at 1:57am
I would fix it but can't find the proper cables to do so.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 31 Aug 2011 at 7:00am
ebay!Smile

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 03 Sep 2011 at 11:28pm
for all 3 cables, its almost more than i paid for my truck.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 09 Sep 2011 at 3:05am
so far so good. the brakes are doing their job and no issues. there are some things though i still ahve to work on. the Weber needs rebuilding. I will be having my son rebuild it. he's 15 and will needs the experience to rebuild the Holley 4160 in his 68 Dart. although the Holley would be better for learning to rebuild, hell his MOM can rebuild the 4160 and has, i think the Weber is a better choice. 

also i repaired one of my wheels. it was leaking BAD, to teh tune of going flat in 3 days. so it got dismounted and i cleaned up the wheel lip with my wire wheel. so far so good. maybe i should cleear coat them after cleaning up the rust. also i think this winter, since i did a quick and sh**y job of painting it, i will pull it in to the carport and do it right. 

oh does anyone have an underhood light for a Z? the retractable one???


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 03 Oct 2011 at 3:21pm
well i wont be doing a carb rebuild anytime soon on the truck. cant afford to have it down right now. my wifes rabbit just sh*t the bed so my truck goes back to full time daily status since it gets better mileage than my Cherokee. which also means, i need to find a tape adapter for my old school Sony tape deck so i can listen to my Ipod. but it'll be good. after sitting for almost 3 weeks, it started up faster than it has in a long time.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 08 Oct 2011 at 3:08pm
Double post

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 08 Oct 2011 at 3:09pm
Guess what.... runability issues crept up on thursday. It was bogging down at part throttle, stalling at lights, and just running like ass. Coil wire died. The cable end BROKE off the cable.  Thank god wires are cheap for this thing. $10 at the local O'Wrongies. IN STOCK!!!! still not running like it should but if all goes well, should have it tuned right tomorrow or monday.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: DATSUNREAL
Date Posted: 08 Oct 2011 at 3:44pm
WOW datto thats some issues you got there , but glad youre thying to work out those bugs .... post some current pics of your build ......

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620 DATSUNREAL

TOO BAD !!!!! WOP YA' JAWS !!!!!


Posted By: datto62073
Date Posted: 08 Oct 2011 at 6:21pm
ill try to get some tonight if hte weather holds out. otherwise tomorrow if i can. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 12 Oct 2011 at 1:17am
ran like a champ tonight. i think what happened was a bad coil lead caused once cyl to misfire due to oil fouling. i have at least one cyl that is blowing oil. since i had a misfire, it was running like crap. i flogged the hell out of it and its running like a champ. with new wires i think it actually helped out the oil fouled plug and literally made it run better. i have no idea why it happened, but it did.... my little Tabitha works like a champ again!!!!! and i am looking at getting another one for my wife ;)

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 06 Dec 2011 at 5:00am
Ever more so now am thankful for my little Tabby. so the passat, Rabbit, and now my Jeep are down. the dubs I somewhat know what's up but the Jeep is a different story. talked to a couuple people and REALLY don't like what I am hearing. I might need to replace one of a couple components the worst being the torque converter or possibly the entire transmission. 

One thing needd to replace on the datto though is the thermostat. She's runnin a bit on the cold side. But she has been since spring so I dunno. Also I need to replace the upper rad hose and clamps. Its pissing coolant at  the rad side. yay more fun......


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 06 Dec 2011 at 8:39am
thats good! im glad you got it figured out. I love driving these old things.

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: DATSUNREAL
Date Posted: 06 Dec 2011 at 11:11pm
awesome deal datto !!!! great to hear shes running better

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620 DATSUNREAL

TOO BAD !!!!! WOP YA' JAWS !!!!!


Posted By: datto62073
Date Posted: 07 Dec 2011 at 3:18pm
Thanks guys, she's not running  right, but better. morrnings she's a cold blooded bitch but once I get her warmed up, she's like a swiss watch. Still need to rebuild the carb, swap in the motor from Blix's truck , and figure out why am pissing coolant. 

I replaced the upper rad hose today and am now loosing more coolant than was beforre. I hope I don't have to replace the radiaitor again. That would suck. This ones only about 4 yrs old, if that. I bought iit for my 78 and swapped it over when swapped motors. sometimes iii wish hadn't sold my Toyota..... any of em.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 11 Dec 2011 at 7:48pm
Radiator needed to be replaced. it was done today, to thhe tune of $150 I didn't have, but she doesn't leak. now if I had fuel I could drive it. I also replaced the thermostat, repaired a spliting heater hose and tightened upp a hose clamp that was causing a leak. no more leaks  that I can see. now for a saturn alt swap so I can solve all my little electriccal issues. what fun....

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 11 Dec 2011 at 9:03pm
The alt swap is super easy, the hardest part is grinding the original bracket.  The wiring is also super simple. Its the best mod you can do besides a weber carb and matchbox dizzy.  

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 11 Dec 2011 at 11:00pm
Aalready have the weber, a 78 EI dizzy and a ZX IR alt so every upgrade is already done just the alt needs more.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 17 Mar 2012 at 2:47am
yay..... more issues.  so i was driving to Seattle and was coming in to town and came to a stop. not only did i stop, the motor did as well. no warning just dead. restarted it and it ran ok until the next light then the same thing. this is frustrating. i drove it to Seattle on THURSDAY and had no issues. but now i have issues. 

any ideas????


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 17 Mar 2012 at 1:03pm
Check easy stuff first!  I'd start with the fuel filter.  Check to see if it's filled with junk.  Does it hesitate under acceleration or act funny at all?

Timing, plugs, wires, points, rotor cap, choke..

Are you still running the factory carb?


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Posted By: datto62073
Date Posted: 17 Mar 2012 at 1:07pm
it runs great other than the stalling. hence why i am puzzled about it. choke is manual, plugs wires cap rotor are about 2 years old, and no i am running a Weber 32/36 dgev with the manual choke conversion that doesn't work. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 17 Mar 2012 at 11:28pm
Drove it home today and no issues at all. this is pissing me off!

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Rusty
Date Posted: 18 Mar 2012 at 12:37am
I agree with Ez, it sounds like a fuel issue. I would say its pulling stuff up from the tank. I had that problem before and thats what it was, but I would have to take the line off and crank it till fuel came out and reconnect, she'd fire right back up until I'd punch it. What started that problem for me was, I ran it out of gas one time and that crap started.

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Posted By: datto62073
Date Posted: 18 Mar 2012 at 1:06am
its weird, she'll do this from time to time and without warning. then i'll let her sit overnight and she'll run like a top again. this is weird. also i have not run this truck totally out of gas ever.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Rusty
Date Posted: 18 Mar 2012 at 1:15am
Even thou you haven't ran it out of gas before, that could still be your problem. Everything settles while it sits and then when you get to driving, all the little particals and stuff get moving around in the tank. I'd drain your tank out, its easy to do, and see what comes out. Change your fuel filter. Do you have one of those fuel regulators on there? That seemed to make my problem worse. I took it off and found out I really didn't need it anyway. 

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Posted By: datto62073
Date Posted: 19 Mar 2012 at 5:23am
i have drained the tank several times since owning this truck and its always came out super clean. and no regulators on my truck. just the mechanical pump and the weber. i'll swap filters as soon as i can get one. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 21 Mar 2012 at 10:07pm
Does it have the return fuel line?

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Posted By: datto62073
Date Posted: 22 Mar 2012 at 12:15am
Not sure. Due to its age though doubt it but who knows.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: smooth620
Date Posted: 22 Mar 2012 at 5:18am
i think a fuel return line started with the '75 model as my '74 doesn't have one.

the occasional stalling when coming to a stop could be from a leaking brake booster or defective check valve. another probable cause could be from sediment sitting on the bottom of the fuel bowl in the carb.


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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 22 Mar 2012 at 6:16am
Could be either one. I still have my 78 that I parted. Might yank the check valve out of it and see. Also I have never taken this carb down. I have a rebuild kit, just no time to do it. I mIght check the shafts as well, they might be wobbly like my other Weber.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 22 May 2012 at 7:40am
well shes been running good but i think i have a clogged fuel filter. i'll pick one up here soon but i have no real reason to drive teh truck right now. our other truck is running good so i'll stick with that for now. i still have a bunch of work to do to this one. gotta wire in my other door pin, rebuild the weber, service the rear diff and trans, oil change, valve adjustment, and brake adjustment. yay loads of fun......

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 22 May 2012 at 11:15am
Cool, easy fixes for the most part, sounds like time is hard to come by!

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Posted By: datto62073
Date Posted: 22 May 2012 at 4:50pm
no time isn't the issue, its $$.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 12 Aug 2012 at 3:20am
well had another setback in the truck. thursday morning my radio died but i could hear static. no lights what so ever ont eh radio. figured my old trusty Sony died. nope popped a fuse. ok no problem. i'll pick some up from work later. blew 2 more before i figured out my BRAKE switch died. yay.... its a non stock item at work, the DC has one i think, and the clutch switch is different on the 78. 

thats all fine and dandy. the demon (Blix's 73)is down for motor work, so i snagged the switch from it. got the switch out, almost have it in my truck adn teh freaking leads break off. soldered em back on tonight and the switch doesn't work. so i adapted em to the clutch switch from the 78. brakes work and no blown fuses. 


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 12 Aug 2012 at 9:44am

Yep, sounds like a regular datto issue.  But please notice that even though you broke the leads off the switch you were able to re solder them and fix it.  If that had been a brake light switch off of ANYTHING else you would have been screwed!   Almost everything in a 620 can be take apart and fixed somehow or another.   

Im not sure what auto parts store your work at but I have worked at a few before and NONE of them can get the part rock auto can.  Rock auto's prices beat your employee discount as well.  



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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 12 Aug 2012 at 2:02pm
well i wasn't able to make the switch work. got it all soldered up and something inside gave way and it was dead.  

also if i can get the switch through work, it'll be $2 cheaper than rock after shipping. and thats without my discount. 


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 12 Aug 2012 at 10:38pm
new switch ordered from work. $6 and change. HALF what Rock wants shipped. should be here tomorrow afternoon. put it in before i leave work tomorrow.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 13 Aug 2012 at 5:17pm
where do yo work?   At the switch factory?

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: Braden620
Date Posted: 13 Aug 2012 at 5:19pm
I bet you didnt get a Beck and Arnley made in japan switch for $6.?? lol    

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 13 Aug 2012 at 5:28pm
No, unfortunatley but it'll do the job. it was the only one available. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Braden620
Date Posted: 13 Aug 2012 at 5:56pm
I worked at oreillys,    crappiest parts supplier ever unless you wanna build a chromed out 350.

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If we ever forget that we are One Nation Under God, then we will be a nation gone under.
Ronald Reagan


Posted By: datto62073
Date Posted: 13 Aug 2012 at 10:33pm
as long as it works, thats all i care about. i'll snag some more out of the yards when i get to em. 

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 16 Dec 2012 at 3:38am
as of last night i figured out why this truck is running like sh*t. the idle mixture screw went AWOL on me. no where to be found. yay...... plus i think the 4spd is dying. i went to hit 3rd on my way to Seattle last night and it went into gear but nothing happened. out and back into 3rd and it started working but i don't know how much longer this is gonna work. i gotta get teh red truck going so i can tear this one down.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 22 Jan 2015 at 3:06am
hot damn its been a while. this old girl has been down for a while, not as long as its been since i updated but thats ok. last february i picked up a 76 GMC  so this old girl was set aside for some well deserved rest. last saturday i got her fired so i could move her to put my GLI down in the feild till i can work on it. yeah the clutch is totally non op. its siezed so tight, i am flexing the FIREWALL. i guess i will be doing my trans swap sooner than i anticipated.

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: datto62073
Date Posted: 23 May 2015 at 8:15am
it has been a while since i updated this but, i have moved Tabby up next to the evil one. this way i will be able to use Tabby as a template to finish up the wiring work and other issues i may run into. i also have all the clutch hydraulics, all new, so hopefully i can fix the clutch issue. if i can, i will be putting this little beast on the road again and hopefully i will be able to drive it since my back surgery.

heres to hoping!!


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 23 May 2015 at 3:22pm
Awesome! Glad to hear you're moving them around and getting to working on them! Keep us posted. If you can't find your specific wiring diagram I probably have a copy of whatever you need.

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Posted By: datto62073
Date Posted: 01 Dec 2015 at 2:39am
i finally got the trans swap components. all i need now is a front driveshaft section from a long tail trans truck. as soon as i have that i can start work on getting it swapped in. yay!!!!

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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: EzCruiser
Date Posted: 01 Dec 2015 at 10:58am
What transmission are you swapping?

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Posted By: smooth620
Date Posted: 01 Dec 2015 at 3:04pm
Originally posted by datto62073 datto62073 wrote:

as of last night i figured out why this truck is running like sh*t. the idle mixture screw went AWOL on me. no where to be found. yay..



You were still able to get it running WITHOUT an idle mixture screw.....simply amazing. It's incredible that you managed to get the engine started and hold idle but it must've been rough though

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Better to learn from other peoples mistakes than to make them yourself.-Anonymous



Posted By: datto62073
Date Posted: 06 Jan 2016 at 12:12am
Originally posted by EzCruiser EzCruiser wrote:

What transmission are you swapping?

an auto is going in for my wife. bum knee and cant use the clutch. 



Originally posted by smooth620 smooth620 wrote:

Originally posted by datto62073 datto62073 wrote:

as of last night i figured out why this truck is running like sh*t. the idle mixture screw went AWOL on me. no where to be found. yay..



You were still able to get it running WITHOUT an idle mixture screw.....simply amazing. It's incredible that you managed to get the engine started and hold idle but it must've been rough though

tell me bout it. it sucked ass. barely ran but it ran.


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1973 620 L20b 5SPd
1973 620 L20b 4SPD
1978 620 KC (parted)


Posted By: Mr.Freez
Date Posted: 05 Aug 2016 at 5:43am
Is a right hand drive 73 620 impossible to create looking to be different !

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Mr.Freez Daddy



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