Short Water Pump Crank Pulley (V-Belt - 302, 351W and 351C) This crankshaft pulley is designed for use with Ford Racing's Short Water pump part number M-8501-E351S. Our pulleys are designed based on the now obsolete Street Rod Pulleys (part number M-8509-R and M-8509-Q) Made in the USA from 6061-T6 Billet Aluminum and designed for use with factory alternator and power steering brackets. Note: Recommend using with Electric Fan for maximum clearance. Grooves: 2 Pulley Diameter: 5.4" Water Pump Pilot Diameter: 3/4" (0.750")