Amp gauge question

The only external shunt Mopars and Fords I've ever seen used the wiring harness itself, IE the charging wire for the shunt. That is, the small gauge wires for the meter were run down into the harness beside the large gauge charging line, and spliced into the larger wire in the engine bay.

I actually repaired one on an early 70's ?Fury? that had broken the splice in the harness.

If you look up the 72 Fury you can see how they did it.

Voltmeter? I'll be darned.......................