bartamos On those alternators,had a pipe dream of a sheave with an interal planetary gear set to speed up the alternator rotor so it would prime and charge at idle,like on an AD or a tractor. Think that would work?? As I said I have done it with belts on a 51 216 original 3600 works good but fan blade barely clears it. In my build never even thought of that but for once it cleared and worked !!