I put TPI in a truck.
These links will help you:
www.jagsthatrun.com
www.chevythunder.com
I bought the Helms manual for the car that I pulled the TPI out of and that helped immensely too.
I used the stock harness. I used chevythunder and the Helms manual to pull the things off the stock harness that I didn't need.
I used the stock computer, sort of. I had stock chip reburned to accept my motor (305 to 350) as well as my heads and cam. I had Brian at tpichips.com reburn the chip.
I put a rear tank in with an intank pump and ran steel lines to the engine and back. The tank I got from board member fuelcellguy.
My air intake ducting I got from Jags That Run. I also got my VSS from Jags That Run.