Using 100 amp mopar alternator to charge batteries out of a vehicle

I use and adjustable solid state voltage regulator that a fellow makes for old motorcycles with excited field alternators on my valiant. It is only the small alternator though. I always had around 14.9v which I though was too high even warmed up and that's with good grounds and the 12v sense wire right from the battery through a relay. This one I set a 14.2 and I'm a happy camper. I just had to change the field wiring as the stock one controls the - to one of the brushes and the new one controls the +

I bought it from Oregonmotorcycleparts .com and it fits an Xs650 Yamaha.
might be worth firing him an email to see if it will work on a bigger alternator.