Which alternator 60A or 46A?

DartGTDan said

My '71 Dart GT (318, auto, A/C) is in need of an alternator. NAPA shows a 60 AMP or a 46 AMP available. What was the factory alternator rated at?

The car has no extra electrical additions other than AutoMeter electric gauges (water temp, oil pressure & voltage) and a tachometer.

Thoughts?

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The factory rating system and NAPA's supplier may or may not be using the same rating system.
Go to NAPA and put whatever they have on the counter. Bring a multimeter. Make sure the rotor is isolated from ground.

If there is a round back and a first generation squareback, the squareback may be a little more capable at idle speeds.
If its a revised squareback, I'd pass for one of the others.

PS. A real geniune Chrysler '60 amp' in '71 was, as best I can tell, similar to the Leece-Neville, and had special wiring and voltage regulator.