Papajoe49, you haven't said what car this is for, but depending on your accessories 55amps may be small, especially if you're running an electric cooling fan or worse, a pair of fans? If it's a bare bones hot rod with just engine, head lights, tail lights and brake lights you're fine, but if you've got fans, audio, seat heat, power anything you could be short. Just saying that it's good to look at your loads, especially if you're replacing the alternator.