This pulley is for use on LONG water pumps, used on SMALL BLOCK Chevy engines, but many early cars have been converted from short to long water pumps, and visa versa. Be sure and confirm that you have a LONG water pump.

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This pulley is for use on LONG water pumps, used on SMALL BLOCK Chevy engines, but many early cars have been converted from short to long water pumps, and visa versa. Be sure and confirm that you have a LONG water pump.