69 Dart GTS 383 4 Speed Completely Original

Does it seem fine when all those accessories are off ? If crusty wiper pivots and a heater core clogged with debris causes those electric motors to draw excessively, other electrical components will fail, like ALT' gauge and/or its connections or bulkhead connections.
To ignore the root of the problem and bypass those points of failure is a popular route. It's definitely the easier and less expensive route.