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Crankshaft pulley for various GM 1957-1972 small block motors with short water pump. This crankshaft pulley is a single-groove pulley that measures 6-3/4" diameter. Stamped with GM# 3755820.
Small block engines with short water pump applications:
- 1955-1968 Chevrolet passenger cars
- 1955-1972 Chevrolet/GMC truck