*** IN STOCK SHIPS TODAY *** BBF crank hub made from billet heat treated steel, has two .250" keyways 180 degree's apart. Uses six .375 bolts on a 2.782" bolt circle and is made to work with 6-71 thru 16-71 roots or screw superchargers.
This hub is for all internal balance BBF engines including 351, 429, 460 and many more. Hub measures from pulley mounting surface to crank gear 2.130".
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