Driver pulley add-on to crank pulley for short water pump big block power steering option. Single Groove. Steel with correct stamped numerals and text. (3874416 BP) 6 5/8" Dia. GM Group #: 0.659 GM Part #: 3874416
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||1965 - 1968
||1966 - 1968
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Classic Headquarters Big Block Power Steering Driver Pulley W-939: