[Craig]

I know what you mean, by the ever changing. Last night I mounted the Ford solenoid on the fire wall and connected up the wires from the alternator. Found out IH uses a "special" wire for the ignition side, it's a single wire brn/wht that is resistive. This way you don't need to have a resister in line with the wiring.
Still debating on the charge wire size, MAD uses one size smaller that the alternator output wire. The Fords have a 6 awg output wire, I used an 8 awg for my charge wire.

Still need to get a battery cable from the solenoid to the starter and install jumper on the starter. By-pass the amp meter. I might leave the bulkhead connecter alone as it not the main charging circuit anymore.