Alternator not charging

Disconnect the two field terminals (spade connectors, Packard 57 type) from the factory wiring. Provide your own +12 V direct from BATT+ & BATT-, using 16 awg or thicker wire. Doesn't matter which field terminal is positive. Also run a jumper from the body of the alternator to BATT- (i.e. don't rely on the path thru engine block). It should output current then, assuming the path into & out of the cabin thru the ammeter in your instrument cluster works (verify w/ ohm-meter).

In my old Mopars, I recall 2 alternator problems. One was the body wasn't electrically connected to the engine block (sand-paper fixed that). The other was that a brush was totally worn down. The copper ring inside had a deep groove worn. Must have been the original 1965 alternator (problem was in 1992).