This is not the usual swap, I think, anyways. I'm going from my stock 87 V6 system to one from a 91 V6. I'm not just swapping the ECM, I'm swapping the front engine harness as well (sick of killing MAF sensors, slow IAC response, and looking for slightly newer wiring). I have the harness, and I have the C100 and C207 harness pinouts, and have figured most of it out, but there are still some things I can't figure out between the 2 systems. I would like to retain my factory front end lighting harness so I don't have to deal with extra junk (SIR crap) and rewiring the front park/turn lamps to get rid of the excessive lengths of wire.
My data is in the following thread: https://www.thirdgen.org/forums/elec...rams-91-a.html

In the DOC file, you can find my work. Any assistance will be appreciated.