Hey hey... Brian told me the truck left his house and told me to come back on here
I'll tell you what I remember figuring out about this truck. From what I could gather.... It started as a California truck with emissions. The motor was replaced with a non-Cali motor, but not the harness.. Can't remember about the computer, though I do think I replaced it with a non Cali one to fit the motor (no emissions codes to be thrown). At the time I couldn't find a harness cheap enough (and I couldn't afford much back then) so i modified the Cali one in the truck to work with the non-Cali stuff.. If you remove the kick panel by the computer you'll see what I did

I believe there was still one code I could never figure out, but the truck was running much much better then, so I was able to drive it.
As for the motor when the truck went down. I was on the highway when a freeze plug on the block got a nice hole in it causing the motor to overheat rapidly. I tried to stop as soon as I could but it still overheated. After that the truck did not run right. I could not afford to even have the heads/gasket checked at the time and so I parked it. If it was more than just the gasket it would've cost me even more that I didn't have.
No matter what you decide to do, I just wanted to fill you in on what had been going on. Wish you luck and enjoy it

Good to see it keep going on, and god I miss driving trucks... I might still get emails from this place, so feel free to PM me if you have any questions.
^^ I did drive the white truck daily