1966 GMC P1000 L6 3.8L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley Bigger is not always better

Bigger is not always better

then 4GA is plenty

This is a direct fit high-output alternator for the 1967 GMC K2500 4

This is a direct fit high-output alternator for the 1968-1972 Chevrolet El Camino 5

This alternator comes with a 56mm pulley in which you can use your stock size belt

1966 GMC P1000 L6 3.8L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley Bigger is not always betterFitment: This is a direct fit high output alternator for the 1966 GMC P1000 3. 8L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high output alternator comes with a 14. 8 Volt GM Style Internal Regulator with one wire connection. This alternator is not plug and play and must be wired with the one wire connection. NOTE: If you require charging at a certain voltage setpoint, we offer a selection of