No Chrome Alternator for me either.

This alternator you bought probably has a partially shorted field. That is, some windings inside the field are rubbed, burned, etc, shorted together, and the field is drawing too much current.

ALL Chrysler regulators should work on pretty much any alternator. I've used early Chrysler units on older Delcos, and in fact have one on my Oliver crawler regulating a Toyota alternator.

I used to run one of the "big frame" late '70's Chrysler OEM 100+ amp units on my old Landcruiser, and I used a regular Chrysler '70 and later regulator on it.