Started 5.2 magnum swap/65 Dodge Dart,/6 4spd convert..but....

magnum alternator.2 wires. 1 hot,green to 1field, other field to ground.
jumped VR wires together gauge shows charge.regular hooked up no charge? VR is grounded and second new one bought.

I even ran additional groun from battety to VR housing.
Dont make sense unless VR no good new?
#2.