69 Dart 4 door cruiser

That is a great word...potentiometer.
So these are variable speed, thank you. I thought I heard that before but was not certain.
I have numerous underhood harnesses I can use and they will come in handy since I want to convert this to the stock electronic ignition. The dash side though....If I don't have an interior harness, I'll have to modify one of my 1973-76 harnesses. The plastic terminal ends are different so I'll have to find a way to connect to the instrument panel and switches.