[MARKDTN]

I would buy a manual for the donor vehicle so you have an accurate wiring diagram. You will find on an '87 that the TBI harness is pretty self-contained. It goes to all the engine components, through the firewall, and to the computer. If memory serves, the only wires left over are SES, hot, ground, ignition, and maybe some sensors. Can't remember about fuel pump, but I think that is in the harness too. It's about as simple as a fuel injection harness can be. The later ones with 4L60E transmissions have a lot more stuff in the harness.