. All my ignition components were connected by a competent ground loop to negative battery terminal to eliminate any voltage drop differences between them, so it was a faulty unit.
but did you also check the POSITIVE supply to the VR? That will also cause overcharge if there's a drop in the hot side.
You must check the ignition/ regulator/ field supply (dark blue) drop with key on/ engine OFF. Hook one meter lead to battery pos. and the other to the switched ignition buss. Should be no more than .2, and ABSOLUTELY no more than 1/2V
My Dart, before the "partial rewire" was ONE volt through the bulkhead!!!