I need help and really don t know were to start so here is I have a 2000 silverado I took the stock engine 326? I think and 4L360E out and stalled a 1988 5.7 with 1986 TPI and a Accel HEI distributor and a 4L80E trans the vats system has been cut out of the truck and all the engine wiring.What I have to work with is a 2000 underhood the wiring harness witch I think there's more wires then needed,and the funds are not there for a painless wiring with the proper pinout I can build a harness.I have a 2000 pcm 1998 pcm and the ecm that went to the 1988 5.7 tbi ecm 16144288.This is just a work truck but it gets worked harder then most its had 4L60E trans.casings broke. I would like to use no vats and no more sensor then whats need to make the engine perform its best.