The problem is with the factory plugs on the Fox alternator..... known to cause fires. There are good write ups on a 3G upgrade from a 94-95 GT and run some knew charging wire and a breaker.
I would just check it to make sure its not about to break and if it is call 928 Motorsports for a new upgraded belt. Powerdynes work for a stockish build so I would keep it for now.