Cranks but won't start. Unplug ground at field spade on Alternator and it starts?

67Dart273 said
Some of the isolated field alternators draw more field current than the original pre-70. Those resistors are gonna run hot, tho

The other BIG BIG BIG problem is that it is UNLIKELY that any replacement or rebuilt alternator actually meets the same specs that the OEM did

I would think when Ign 2 gets power at ballast resister that some voltage flows through ballast to Ign 1 voltage regulator terminal and then to alternator field circuit during Start? Would that reduce volts to coil?