What do I look for when replacing the alternator in a 73 Malibu? The alternator in the car has a "Duralast DL7127M 8182 REMANUFACTURED" sticker on it. It is stamped with "1102480 4K29-12VNEO". I plan to add a CD player, amp, and speakers in the future. How do I know what amp. would be the best for my use?