Big Block Chevy Water Pump Pulley, 396 427 454 V-Belt - Long Water Pump, LWP, BBC Chevy Big Block Crankshaf Pulley - LWP, V-belt (396-427-454) Made in the USA from 6061-T6 Billet Aluminum Designed for engines with Long Water Pump 1 Groove, 6.2" Diameter, 2.15" Overall Length