voltage regulator

That Bosch no is an oddball, seems to "out of the U.S." in popularity

The ones I posted earlier are the alleged high quality ones that are popular.

For the 70 / later type, (isolated field) someone on here posted one they found by a third party advertising heavy field current

I believe these were the people

http://alternatorparts.com/external-voltage-regulator-high-output-alternator-kit.html