yes the decision is to upgrade this one. The old generator, though it spins fine, looks like a unworking fire hazard with cloth insulation frayed to missing, cutout missing its cover, (cutout predates and was precursor to external regulators) replacement or rebuilding cost as well as the 6 volt thing to start with. 12v halogen headlight reflectors also look desirable etc. That being said, I've read a lot of the debate; one wire, three wire etc. It appears internal regulators came to be around 1973 as a BAT terminal on the rear and a side two prong plug. da plug? Logic say this must be the more desired conversion (according to some) 3 wire setup. It appears I can get a AC DELCO remanufactured all the way up to 63 amp on RockAuto for between $40-$50 but I have not seen a single pully unit with 5/8" pully. wondering if there was going to be a question..? #1. Does anyone know of a year and model that is a fit without having to buy and swap out the pully. One of our vintage vendors offers the alternator with a 3/8 pully at $140 and the 5/8 pully separately for $30! #2 does someone have a basic wiring diagram (pdf or jpeg) that shows the 3 wire hookup. I am rewiring the entire truck 12 circuits with fuses and relays. the old cloth harness (what still exists) is about in the same condition as the 6v generator. #3 I have a good 12v coil for the switch to 12v what is a good fit for a condenser under the cap? 55-57 235 work? or does it even need to be changed over? thanks, Larry
