Billet Aluminum Big Block Chevy V-Belt Crankshaft Pulley - Long Water Pump (3V) - High Flow Larger 6.85" diameter provides increased cooling water flow and charging for street driven applications. 3 Groove crankshaft pulley for Big Block Chevy engines 396 427 454 LWP. Designed for use with stock power steering and alternator brackets. Chevy 396 427 454 Big Block Engines with long water pump ---1973+ Chevy Trucks & Cars ---1974+ Chevy Corvettes Diameter: 6.85" Overall Length: 3.0" Grooves: 3 Bolt Pattern: 3 Bolt Bolt Circle: 3.2" (2.7" Center to Center) Pilot Diameter: 2.1".
