I'm replacing a 327 with a 454 and need to purchase all new brackets, accessories, etc. and was wondering if an alternator upgrade should be done as well. I'am running an electric fan and a MSD distributor but besides that I don't have any other major items (a/c,pw,etc.)that would require more juice, although I would like to add an MSD 6AL box in the future. My first question is how can I find out how many amps my current alternator is producing and how high should I go with the replacement? I'd rather not get into re-wiring the car just yet. Oh, and how can I tell if the regulator is internal or external? Thanks!