hey, i'm looking for a 350-400 amp h-o alternator for my '97 f-150. Anyone have any reccomendations for places to contact? I have just recieved an email from Nathan at excessiveamperage.com and he said the biggest he could build was a 275 amp alternator. Mralternator.com doesn't have any that big, and neither does h-o-alternators.com Is it possible to get an alternator that big without any custom work?