Wiring harness advice

Mike69cuda said

I had a newer alternator, so I was able to swap grounded brush from ground to a spade lug to make the conversion to a two wire field. I guess the best solution depends on just what you want to end up with. Having a new alternator and regulator is not a bad thing though.

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Not quite following you here.
Are you saying you already had a 1970up Chrysler alternator, but someone had put a ground wire on one of the brushes? That's pretty common way to use a later style on a earlier positive switching regulator system. So then you just undid that to use it with the ground switching regulator.