Moroso 64200 Moroso Chevrolet Big Block 396-454 (w/Short Pump) Crankshaft Pulley - Single Groove - Cast Aluminum

Crankshaft Pulley, Cast, single groove, 30% reduction, BBC short water pump

• Fits: Chevrolet 396-454, pre1969 (with short water pump)
• Precision machined from high grade, lightweight aluminum castings
• Extra-deep belt grooves provide added belt retention during rapid changes in engine RPM
• Small pulley diameter slows fan, water pump, and alternator speed to reduce horsepower-robbing drag
• High RPM water pump operation is improved, reducing impeller speed below cavitation threshold
• Uses 36° x 17/32" wide belt