RE: 96 130amp alternator
As far as I know, you may need to stretch out the wiring from the harness to the alternator, but that should be it. I also remember something about the rear case being slightly oversized which may require some slight filing or grinding at an interference point to the intake housing?
FWIW, I installed a new 160amp unit from PAPerformance designed for the 'stangs and it fit with no alteration.