94 c1500 build

[Jerryred94silvy]

This is not only my first gmt400, but my first ever vehicle of any sort. She's a '94 regular cab long bed 2wd. 4.3/4l60.




When I first bought it:

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Barely got above 45mph on the way home because it ran so poorly. So the obligatory plugs and wires change was done, this didn't help any.

So then the fuel pump was found guilty and relieved of duty:

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After fixing a freeze plug that went on vacation while the truck was running and the distributor it ran pretty good.



Then, a mile from home, the transmission started leaking on the way to get the truck inspected....So that had to come out:

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Replaced the front and rear seals and slapped it back in the truck.

That lasted not long at all. This time around it made it to the inspection place before it puked all of the fluid onto the parking lot....5 minutes from home...so my Dad towed me home:

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[Jerryred94silvy]

I needed the truck to run and didn't have time to get the trans rebuilt. So the replacement trans came from the junkyard:

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How Roadkill is that?

This trans actually worked! (kinda) So for the first time since I had bought it about a month earlier I was able to drive it. And I loved it. But alas, the joy was short lived as white smoke began coming from the tail pipe. The intake gaskets were tried and convicted:

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This did not fix the problem. Once it was all put back together the truck would not start for anything, no matter what I tried. And coolant was found in the oil again. I'm pretty sure my soul died a little that day.

 

[Jerryred94silvy]

The truck sat for a good while while I tried to figure out what to do. I had planned to pull the motor and replace the head/intake gaskets and any other gasket or seal I could get my hands on with the motor out and just be done with it.

Then God answered some prayers, because I was given a fully rebuilt and upgraded 355 sbc:

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So I then had the original transmission rebuilt:

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[Jerryred94silvy]

I have pulled the old engine/trans out am now in the process of getting all the parts I might need off of the v6.

More progress and pictures to come...

 

[skylark]

Just a heads up, you'll need the V8 frame side engine mounts.

 

[PlayingWithTBI]

You'll also need to make some modifications if you put in a carbed engine with the old style HEI distributor in a 94. Things like a TPS to control your trans and program the PCM to run without MAP, IAC, ESC, etc.

 

[Supercharged111]

Nahh, just let the CEL stay on. Feed the computer TPS and tach and oil pressure switch. This should be all you need for the starting and fuel pump circuits unless I'm forgetting something.

 

[PlayingWithTBI]

This should be all you need for the starting and fuel pump circuits unless I'm forgetting something.

Plus FPR or fuel pump mounted on the block.

 

[Supercharged111]

I had a carb with electric pump eons ago and overwhelmingly prefer that to block mounted. Turn the key and the pump fills the bowl, car fires right up. I used a Mallory regulator set to 5.5psi.

 

[PlayingWithTBI]

Yeah, I just didn't want to get into that argument, LOL.