So I have good news on this truck!
So the computer was receiving power to the plug from both injectors, and the connection would break when the fuse or injectors were disconnected so it didn't seem like there was a short anywhere in between. At this point it made sense that the computer wasn't returning a pulse signal so that's why the injectors never worked. I pulled the computer out of my 89, and the injectors started to spray fuel and eventually it ran. I couldn't use the computer from my wrecked truck because the plugs are different but I'm glad my 350 computer worked to test it.
Then we bailed down to Reno and bought a 91 k1500/4.3/5spd computer (although I was stuck in Reno for way too long, accident on the highway kept me in stop/go traffic for over an hour) and got back in the dark, installed the new computer and the truck runs without skipping a beat. It runs really good. Heater kicks ass too!
Tyler also purchased a new grille for it, although it's a GMC one. This was the cleanest grille out there, all the chevy grilles regardless of 88-93 or 94-98 were thrashed unfortunately. So it'll be a GMC for a bit. The front bumper is also a little tweaked so maybe we can fix it, if not I have another bumper with straight brackets. Side note, that square body mirror needs to go on the passenger side. It looks super goofy, and fortunately I have a bunch of 88-94 mirrors.
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So we wanted to drive it, but the clutch is not engaging whatsoever. Tried half ass bleeding it by pressing the pedal a million times but I don't think that's it. Probably needs a new slave or something. Pushing the clutch in while the truck was in gear and starting the truck was doable but difficult. We made it move in 4low up to the house to make messing with it easier.
I'm glad I finally found the problem and didn't have to trace shorts and mess with more stuff, although I've never seen a computer in one of these trucks die, so this was a new one for me!