‘75 Dart Sport Charging system issue(s)

I recently had charging system problems myself. I had a bad alternator and I replaced both Alt and VR at the same time and ran into more problems. I should've just attacked one thing at a time to rule out individual pieces of the puzzle. Anyway my problem ended up being the Napa VR I had gotten was bad right out of the box. The wires inside the had come apart and would make periodic contact causing all sorts of problems.

Good luck!