I am swapping a 305 TPI with a 350 LT1 I am also installing a painless wiring harness. The problem is I need a wiring diagram for a stock 1989 firebird. I looked at the Helms manual but I am hard press to spend $109.00 for one time use. If you have access to 1989 stock wiring diagram I would like to purchase a copy. It the only thing holding me up.
Thanks Mike