running an Explorer 302 with the Explorer front dress. bought a TuffStuff 225amp alternator 7778F which is for that Explorer. its not charging at idle but just a tab off idle its fine. i need it to charge the most when at idle to power a winch. i asked TuffStuff about running a smaller pulley and they said it would help but they dont make one. they said the shaft is .668 but did not say what size the pulley is. i THINK it is 58mm, but not exactly sure where you measure from to be honest. anyone recommend a place to get a smaller pulley?