Billet Aluminum Pulley Kit for Long Water Pump (LWP) 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. Pulley Kit Contents: Water Pump Pulley BBCL2WP Grooves: 2 Diameter: 6.2" Overall Length: 2.8" Crankshaft Pulley BBCL3CR Grooves: 3 Diameter: 5.4" Overall Length: 3.0" Bolt Pattern: 3 Bolt BBC1ALT 1 Groove Alternator Pulley and Cap Diameter: 2.7"