You could upgrade to a CS144, they put out a lot more at idle than the stock C130D. You'd need an the alternator (duh), 1999 Camaro 3.8L alternator bracket, the mounting bolts, the plug for the alternator, bigger charge wire (which you should already have), and probably a different sized belt. You'd have to grind a bit on the back of the alternator (not that much, I have pics) to clear the supercharger. It's a beast, and you can upgrade it to 200A later on with normal tools (no soldering). Probably one of the best things I've done to the car: