Billet Aluminum Water Pump Pulley for Long Water Pump (LWP) engines. Will fit Chevy 350, 283, 302, 327, 305, and 400 engines. Designed for use with stock power steering bracket and alternator bracket. Note: Long water pump Chevy engines are 7.287" from face of water pump pulley to block. Pulley Diameter is 6.6" with 3 bolt pattern.