Black Chevy Small Block Mechanical Water Pump High Flow Aluminum Water Pump ---Clockwise (Standard) Rotation ---5 5/8" Hub Height (Measured from pulley mounting surface to timing cover) ---5/8" Pilot Diameter ---Finish: Black Powder Coat APPLICATION: ---1955-1968 Small Block Chevy Engines This mechanical water pump is designed for maximum flow. For use with factory or CVF Racing pulleys and brackets. See our E-Bay store for a complete selection of engine accessories including pulleys, brackets, compressors, power steering pumps and alternators.