Hi! I have one blank spot left in my engine compartment (except for a lower radiator hose), and that is the need for an alternator. I'll be running AC/heat, electric fan, electric fuel pump, and lights of course, and windshield wiper(should never see rain). NO power windows or power seats. Would a 65 amp be enough (internal regulator?)? or what would be a good alternator for my truck? Can I have too much amps?