Chevy Big Block Underdrive Crankshaft Pulley Long Water Pump (396-427-454) Billet Aluminum Crankshaft Pulley for Chevy Big Block Engines with long water pump. These pulleys are MADE IN THE USA from 6061-T6 billet aluminum. We machine them at ultra high speeds to get an amazing surface finish. They are designed for use with stock power steering and alternator brackets. Note: Big Block Long Water Pumps (LWP) are 7.29" from face of water pump to block. Crankshaft Pulley BBCL2CR Grooves: 2 Diameter: 5.4" Overall Length: 3.0" Bolt Pattern: 3 Bolt Material: 6061-T6 Billet Aluminum Made in the USA!.
