620 KC project

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Edm620
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620 KC project

Post by Edm620 » 09 May 2018 08:12

Finally got to pick up my '76 620 project truck and have begun the process of stripping it down. I have also bought a '86 720 that will donate it's chassis for upgraded front suspension including disc brakes. Still tossing about ideas for the engine, the 620 has L20 + 4 speed, the 720 has naps-z2.4 + 5 speed. Will get both trucks stripped down before needing to make decision on what to do for the engine. I need to keep on a fairly tight budget at least for the initial build.

Definitely have some rust repair to do, rust around some of the cab mounts but still fairly solid. Sunroof will either need to be replaced or filled in, I'm leaning to keeping a sunroof but a larger size.
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We can't solve problems by using the same kind of thinking we used when we created them.”
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Edm620
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Re: 620 KC project

Post by Edm620 » 02 Jun 2018 21:37

Almost ready to pull the body off the frame, have been working on the truck pretty steady. Unfortunately the engine had been swapped out at some time as I discovered an L18 residing within. That motor and 4 speed has been sold now leaving the decision as to what to propel the truck with open for the time being. How can you tell the truck was stored in a field? By the mouse nest in the heater box! I found quite the mess in there complete with the former tenant.
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house of mouse
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We can't solve problems by using the same kind of thinking we used when we created them.”
Albert Einstein

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Edm620
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Re: 620 KC project

Post by Edm620 » 15 Jun 2018 22:26

Finally have the body removed from the chassis and stuffed into my cargo trailer. Whew. While to cab mount bolts came apart fairly easily, 3 of the box mount bolts proved to be very stubborn. The tab affixed to the heads were relatively useless in preventing the bolt from turning and nearly impossible to hold in place due to the offset C channels. Had to get a small diameter cut off wheel and even then could only get in partway but persistence prevailed. Next step is to bring the 720 in to get stripped down.
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We can't solve problems by using the same kind of thinking we used when we created them.”
Albert Einstein

datzenmike
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Re: 620 KC project

Post by datzenmike » 16 Jun 2018 15:41

Yeah just swap the 620 body onto the 720 frame assuming the 720 is also a long wheelbase truck, and keep the Z24. If the 720 is a short wheelbase you'll have to make a flat bed for it. Keep the 620 wiring and you'll have to convert to internally regulated alternator (on the 720) easily done. The upper rad hose on the Z24 will have to be rerouted to the left side. The heater hose on the Z24 comes out of the block, not the head. Mount the dual coils and done.
"Nissan 'shit the bed' when they made these, plain and simple." McShagger510 on flattop SUs

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Edm620
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Re: 620 KC project

Post by Edm620 » 23 Aug 2018 23:10

Lots of work done since I last posted. I stripped down the 720 (reg cab long box) and had the 2 frames to compare - the forward box mounts will need to be relocated and the rear most mounts re-drilled 5cm forward. The 720 frame is slightly longer so will shorten it accordingly. Gas tank presents an obstacle for the moment.
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The remnants I took to the scrap yard - got $79 for it! (kept the aluminum wheels). Note the 620 frame underneath shows how much shorter the frame is as the bumper is under the box
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I sorted through the 720 wiring harness and intend on putting the complete 720 electrical into the 620.
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More power desired and while I have it apart I'm going to investigate possibilities. From what I've read the "old school" approach of header & carb doesn't work on the NAP-Z motor, so a Turbo may be in order. Anyone have experience with that?
We can't solve problems by using the same kind of thinking we used when we created them.”
Albert Einstein

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Edm620
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Re: 620 KC project

Post by Edm620 » 23 Aug 2018 23:11

other pictures got severed
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We can't solve problems by using the same kind of thinking we used when we created them.”
Albert Einstein

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Edm620
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Re: 620 KC project

Post by Edm620 » 03 Sep 2018 10:25

Fame mods are done, now to get it blasted and usher in the build-up phase
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Forward box mounts relocated
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We can't solve problems by using the same kind of thinking we used when we created them.”
Albert Einstein

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