The Moroso single-groove cast aluminum crankshaft pulley is intended for Chevrolet small block engines equipped with a long water pump. Designed for single-belt accessory drives typical of long-pump configurations, the pulley provides the correct groove spacing for compatible Chevrolet small block front-drive layouts and is suitable for service or drive-geometry adjustments on long-pump engines.
Moroso Chevrolet Small Block (w/Long Pump) Crankshaft Pulley - Single Groove - Cast Aluminum