*** IN STOCK SHIPS TODAY *** SBC crank hub short, made from billet heat treated steel, has one .250" keyway and one .187" keyway 180 degree's apart. Uses 2.782" bolt circle and is made to work with 4-71 thru 16-71 roots and screw superchargers. This hub is for all internal balance SBC engines including 265, 283, 327, 350 and many more. Hub measures from pulley mounting surface to crank gear 2.250".
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