I did put the PM alternator on. Im still not happy with it at idle. its around 12.8-13 volts at idle without anything turned on. with the lights on it idles around 12.4. if I give it gas it goes up fine. just not enough at idle. I started it with no ground on the field wire and it didn't charge at all. I put a 10 gauge wire on it and it started charging. do you know what the part number is on your alternator. My old 68 Charger had a painless harness in it I switched the alternator on it to a mid 90's truck 135 amp piece because of the huge fuel pump on it to feed the Procharger.