Chevrolet small block short water pump pulley, chrome plated, single groove, Mr.Gasket 4970. Originally used on 1955-1968 small block engines, with or without power steering, but can be used on later engines using the short water pump design.
How to identify your water pump design: The short water pump design is where the pump is almost touching the timing cover. The long water pump has clearance enough to put your fingers between the pump and the timing cover.
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