Looks to me like Ford source a Mitsubishi alternator (meaning different Regulator and Rectifier) for the SC, what would stop us from swapping to a normal Ford 3G alternator and moving the 8 rib pulley over?
The 94 Mustang 130A Alternator looks like an option
The 6G alternator is a bolt in replacement, but requires a new wiring connection. I believe the 3G alternator has one of the mounting lugs in the wrong position to fit an SC accessory bracket.
I've heard a few people mention using a 6G alternator on an SC. What does that alternator fit (what car/motor) ? What needs to be done to the wiring and mounting on my 91 ? David