Ok, so here is what i am attempting to do, I have a 85 z28 with the carb. 5.0 and 5 speed. I have currently dropped and 350 tpi out of an 89 iroc. i took the whole engine harness with it and computer. But the c207 connector pinouts do not match up, i was wondering if anyone had done this before. I do work at a mechanic shop and have access to wiring diagrams. But i am pretty sure i'm gonna have to add some fuses and wires for the injectors and to run power to my fuel pump.......

 

buddy of mine converted a 91 speed density harness to match the firewall dash connector of an 88 GTA. try and see if you can find the diagrams for the pinouts. i know factory service manuals have them

also, you'll have to do something about the VATS that the 89 ECM needs to run the car. without it, it will never start. could probably trick the ECM into thinking the VATS is there and working, do a search for VATS bypass.