1969-1978 GMC K35 V8 5.7L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley This is a direct fit

This is a direct fit high-output alternator for the 1987 Chevrolet V10 5

This is a direct fit high-output alternator for the 1987-1990 GMC V1500 Suburban 6

This is a direct fit high-output alternator for the 1987 GMC R2500 4

When two is not enough 315 Custom Audio has the solution

1969-1978 GMC K35 V8 5.7L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley This is a direct fitFitment: This is a direct fit high output alternator for the 1969 1978 GMC K35 5. 7L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high output alternator comes with a separate adaptor plug. One side will plug directly into the aftermarket high output alternator, and the other side will plug into the factory plug. NOTE: If you require charging at a certain voltage setpoint, we offer a selection of