Billet Aluminum Pulley Kit for Ford Big Block V Belt Pulley kit for 429 & 460 ("385" series) Engines. This kit will for result in underdrive pulley ratio of 88%. Designed for use with stock alternator and power steering brackets. Application 1) Ford Big Block "385" series engines Fits vehicles with: 1) Factory 4 bolt dampener required. 2) 1970 or newer water pump is required 3) Dampener face to water pump flange face 3 1/16" Ford Pulley Kit Contents: Water Pump Pulley P/N BBFL2WP Grooves: 2 Pulley Diameter: 6.0" Pilot Diameter: 0.625" Crankshaft Pulley: P/N BBFL3CR Grooves: 3 Crank Pulley Diameter: 5.4" Crank Pulley Bolt Pattern: 4 Bolt Alternator Pulley: P/N BBFL1ALT Diameter: 2.7" Alternator Shaft Diameter: 11/16"