Reply to "MSD Small red wire to 12v key on source"

This may be a long shot, was there ever a wire for the elctric choke ?
Or the reverse light power wire that goes to the ZF ?
The msd should draw minimal current on the small red wire as it is the trigger wire. All the load will be on the large red and black wires.
Does your alternator have 2 small wires going to it ? one would be the stator, that would have 12 volts when the ign is on ( only).
Good luck.