Ford Big Block Crankshaft Pulley - 1V (429 - 460) 1 Groove V Belt Crankshaft Pulley for Ford Big Block Engines (429 - 460). Designed for use with stock power steering and alternator brackets. We also have brackets, alternator fans and power steering pulleys available for Big Block Engines. This is a great price! Fits vehicles with: 1) 1970 or newer water pump 2) 4 Bolt pattern on crankshaft pulley 3) Dampener face to water pump flange face 3 1/16" Crankshaft Pulley: P/N BBFL1CR Grooves: 1 Diameter: 5.4" Overall Length: 1.7" Bolt Pattern: 4 Bolt Material: 6061-T6 Billet Aluminum Made in the USA.