Black Small Block Chevy Mechanical Water Pump High Flow Long Water Pump LWP SBC. Black Chevy Small Block Mechanical Water Pump. High Flow Aluminum Water Pump. 6 15/16 Hub Height (Measured from pulley mounting surface to timing cover). Finish:&#######xA0; Black Powder Coat. 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.