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Extending Single Cab to a King Cab

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varunkap View Drop Down
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    Posted: 21 Dec 2014 at 12:46pm
Hi All...

I'm in the process of extending my single cab 720 to a King cab by chopping the cabin from the back and welding new additional sheets. Since there are very few 720's in the entire country, I don't have access to another 720 King Cab for reference and measurements. 

Can someone please help me in telling the dimensions of the extended cab and the bed (as mentioned in the pic) so that I can also follow the same ?

Regards,
Varun Kapoor

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TMD View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMD Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2014 at 1:04am
What you are attempting is a lot of work, one of the things we need to know is if you have a regular cab/long box truck, if you have a regular cab/short box, then making a kingcab out of it is going to be hard to do.
The kingbab trucks have a kingcab fuel tank.
The regular cab/short box has a shorter frame.
I can get you measurements from my kingcab, but if you have the short frame, there was no kingcab/short-short box, the kingcabs have there own kingcab box.

I know the voices are not real, but they have some really good ideas.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMD Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2014 at 1:14am
I also forgot to ask what year your 720 is?
From the rear door line/pillar on the cab to the rear of the cab is 20 1/4 inches( 51cm, 4mm), I do not have a kingcab box anymore, so you will have to get that measurement from someone else, but unless you have a longbox, you will have to extend the frame, but then the wheel well will not be in the correct spot.
It would help to know the year and which box you have.


Edited by TMD - 22 Dec 2014 at 1:23am
I know the voices are not real, but they have some really good ideas.
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smooth620 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2014 at 5:04am
Datsun Nissan made short beds for 620 and 720 crewcabs only. You can modify your bed if you wanted to.


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

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Post Options Post Options   Thanks (0) Thanks(0)   Quote JoeCool Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2014 at 5:27pm
I would love to get my hands on one of the crew cab 620's! 
*1980 Datsun 720 pickup*

"If it falls off, it doesn't matter" Tom Magliozzi of Car Talk

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMD Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2014 at 8:32pm
The thing is he wants to make a kingcab out of a regular cab, now if he has the regular cab/longbox, then he might have half a chance, as that is the long box/kingcab frame, he will still need to deal with the fuel tank, but it is doable, but if he has the short box, well either he will have to extend the frame, or have a short/short box like the double cab in the photo above, and he will still have to deal with the tank, he has no kingcab tank in a country where he might have the only Datsun/Nissan 720 within a hundred or more miles.
I know the voices are not real, but they have some really good ideas.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote varunkap Quote  Post ReplyReply Direct Link To This Post Posted: 24 Dec 2014 at 10:05am
Thank you so much guys for your help. Smile

I've a regular cab with a long bed. So extending the cabin is doable... Will add another 20 inches to the regular cab.. Will add fixed glass windows like the King cab on both the sides.... It will also make ample space on the roof for the electronic sliding sunroof.

After doing so many modifications... relocating or reshaping the fuel tank is not a big issue for me. The box is already in a bad shape (full of rust), so will be making a new one from scratch. Will accordingly, make the wheel wells too.. Smile 

Till date, I've already done the following mods -
* Changed IFS to Solid Axles
* 6 Lug to 5 Lug Conversion
* Upgraded to 33 X 12.5 X 15 Tyres on 10J Alloys
* Swapped a 2400 CC Turbo Engine
* Converted 2WD into 4 Wheel Drive with 5 Speed Gearbox
* Installed Power Steering
* Installed Disc Brakes in the front

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMD Quote  Post ReplyReply Direct Link To This Post Posted: 24 Dec 2014 at 2:08pm
20 inches is a lot, are you going to extend the frame also, or you just going to extend it 20 inches from the rear door line like are kingcabs are made?
It seems that other countries received different versions of 720s, as the USA 720s all had front disc brakes, and power steering was an option.
What engine did your truck originally have, "L" or "J" block?
Have you read the full version of this guys build?
http://community.ratsun.net/topic/23562-supercharged-vg30-stretched-720-pickup/
http://www.datsunminitruckin.com/supercharged-vg30-720_topic920.html


Edited by TMD - 24 Dec 2014 at 2:12pm
I know the voices are not real, but they have some really good ideas.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote varunkap Quote  Post ReplyReply Direct Link To This Post Posted: 25 Dec 2014 at 4:38am
I won't be extending the frame. I'm just going to extend 20 inches from the rear door like the kingcabs. This will give ample room for the sunroof also. Also, i can put in some baby seats at the rear and put recliner seats in the front. The one I have was imported from Japan and it had all 4 drum brakes and it was without power steering.

Yes, I've read the entire VG30 Supercharged discussion. Got some really interesting and useful tips from it. Currently, I'm doing the patch work on the rusted cabin's exterior and floor. Once it is done, I'm all set to cut the cab..  

Today got some parts from Thailand like rear lights, front indicators, door & windscreen rubber seals and monograms etc.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMD Quote  Post ReplyReply Direct Link To This Post Posted: 25 Dec 2014 at 2:56pm
The reason I posted the link to that fast720 thread was because of the way he extended the cab, he did it by adding metal in between where he cut it and then shaping it, that is the way you are going to have to do it, while those of us here in the area I live in would just buy the back half of a kingcab cab, and just stick it on our single cab, but we have access to what is needed, they are in the wrecking yards where I live.
I kept looking at yours and thinking it was a short box frame, but I think the big wheels are what makes it look like a short box frame to me.
Do you have a box for your truck, I ask because it looks like the box mounts have been modified, it looks like one on each side has been cut off.


Edited by TMD - 25 Dec 2014 at 2:57pm
I know the voices are not real, but they have some really good ideas.
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