Or, alternatively, answer me this: I have some stock regulators in my parts pile. I need to study the P.O.'s wiring a little more, but it appears he's using the stock black wire and white wire, with a red power wire run from the main harness and a green ground wire run from the battery/harness.
If I can find the stock green wire, I can just plug in a factory regulator (using the black and white wires he's using) and see if it regulates, right? That way I can test my parts pile regulator.