This pump fits all GM LS series engine, but will require the use of aftermarket competition brackets. it measures 6in. from block surface to hub and features a relocated thermostat housing on the top. It is a standard clockwise rotation design to accommodate racers using a simplifies accessory drive setup. It is primarily designed for use in racing applications and will require the use of longer that stock mounting bolts. Can be modified for street applications, but will not fit accessory brackets. can not be used with a stock manifold, must be used with carbureted style manifolds.