Pulling this one back up.
Got an 00 SSEi alternator from JimmyFloyd (thanks Geoff) from a current JY find. This is the 125amp model. It'* been tested and runs like a champ off the 97 connector on the bench testing.
Don there was a ZZP voltage booster found on a GP at the yard during a trip with the Olds105 and Buick104 man'*. Gave it a try and that does bump the voltage as well.
I'll likely change this out in steps to ensure success.
First PS pump, it'* only a bracket. Then the alternator and water pump with the thermostat at the same time.
00 Regal GS: All kinds of cool stuff.