Billet Aluminum Water Pump Pulley for Short Water Pump (SWP) engines. Will fit Chevy 396-427-454 engines. Designed for use with stock power steering bracket and alternator bracket. Note: Long water pump Chevy engines are 7.29" from face of water pump pulley to block. Water Pump Pulley BBCL1WP Grooves: 1 Diameter: 6.2" Overall Length: 2.8"