Thanks guys,
I think I'll give the harness a try. I have all of the other components that were original; the
kickdown switch with what appear to be the proper
connections (though it looks to have some non-standard nuts on it), an original-looking clear rubber piece that used to hold the kickdown connection to the wiring harness, plus the crusty remnants of my wiring that I tried to clean up and patch but just don't trust.
I also have the original governor switch that I tested using Fred's procedure, an original relay that I still need to test, and now a solid OD transmission.
Will report back any surprises on the harness.
Appreciate your inputs.
Jim