Chevy Small Block Crankshaft Pulley - 1V Long Water Pump (283, 302, 305, 327, 350 & 400) Underdrive diameter for Increased Horsepower! This pulley has been CNC machined in the USA from a solid bar to ensure that it is balanced and runs perfectly true. We then hand polish each part to a mirror finish so that it really makes your engine stand out from the crowd. Technical Specs: Billet Aluminum 1 Groove V-Belt Crankshaft Pulley. Pulley Diameter: 5.4" Bolt Pattern: 3 Bolt Material: 6061-T6 Billet Aluminum (Not Cast Aluminum like the competition) Note: Long water pump (LWP) pumps are 7.0" from face of water pump to block while SWP engines are 5.6" tall. Made in the USA!.
