I meant to answer this part too. Although its more of guess than an answer. There's a couple of different types of regulators, and I suppose on an alternator with drasticly different field circuit demand, a matching regulator would be needed.
Voltage is regulated by controlling the power to the field. Field is shorthand for the coiled windings that create an electromagnetic field when electricity goes through them.
Power through the field windings can be regulated either on the wire feeding in, or the wire out to ground.
Chrysler's mechanical regulators were on the feed wire. The field return was grounded to the housing.
Chrysler's electronic regulators control flow through the wire out. System voltage is monitored by a connection to the wire in.
These two strategies go by a few different names such as, a and b circuits, or pos and neg regulation.
BCJohnny had some pertty helpful technical info and explanations in this thread:
How Alternators are "Upgraded" - Page 2 - Speed Talk
