Thank you very for the suggestion! You make a good point, once you take the O2 wiring out of the mix, there's not much left. I checked out the Ron Francis harness on LMR and it includes the low oil level sensor, so fabricating the battery and starter solenoid wiring wouldn't be bad. This might actually be a cleaner setup over-all since he wants to do a trunk mounted battery anyways. Is there anything else wrapped up in that harness? I'll have to put my car up and trace it around to check. I need to find some harness drawings for these cars, I feel like I'm working with my hands tied behind my back without real schematics.
I have a brand new EFI harness for the top of the engine, so that's already covered. The next one to fab-up will be the alternator harness, but i think that one is pretty simple. Aside from the alternator itself I don't recall if there are any other special connectors that I'll need to hunt down.