*** IN STOCK SHIPS TODAY *** SBC crank hub made from billet heat treated steel, has one .250" keyway and one .187" keyway 180 degree's apart. Hub uses 2.782" bolt circle and is made to work with 4-71 thru 16-71 superchargers.
Included in this kit is a hub, alum degree ring with 360 degree's of marks six grade 8 bolts and washers. 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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