I am running a GM CS130 alternator that I believe is 105amps. It works great, couldn't be happier. With a 5" crank pulley at a 1000rpm idle it charges at 14.3 with the headlights, fuel pump, water pump, fan, and msd running.

Another thing I like about is thats its nothing special or unique. It fits a ton of different GM cars so I can easily get another at the parts store if needed.

68 Barracuda Formula S 340