Single field Alternator rebuild

Double pulley? All #26425537 were single pulleys and 37 amp. If you had another model with AC, you were given a better alternator (46 amp, double pulley). This doesn't show on the FSM shown but there were many Barracudas w/318 and AC. If you want to be a little more correct, you might go single pulley at rebuild. The FSM shows the single pulley at 2 1/2" diameter and the double pulley at 3", a little slower.