Moroso 64060 - Crankshaft Pulley, SB Chevy, Double Groove 68 - Earlier

•Crankshaft Pulley, double groove, 25% reduction, 5.40" O.D.
Fits: SBC, 1968-earlier (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
•Use 36° x 17/32" wide belt