OP never answered about his alternator type and wiring. If two field wires go to the alternator, then the Vreg shown w/ triangle connector works. Best to run a dedicated ground wire to the case of the VR via its mounting screw. Perhaps a 100 A alternator draws more field current, but not assured, nor that a base Vreg couldn't manage that draw. Perhaps someone has been there. Since an OE alternator, there must have been an OE Vreg for it, with PN's. Rockauto is pretty good on PN's and what fits.