Specifications: Type: Water Pump Pulley Three Grooves Machined From Billet Aluminium Pulley Diameter is 6 9/16" Pulley is 2 7/8" Tall Bolt Pattern is 2 3/4" Center hole is 1 1/8" Belt Type: V-Belt These Feature deep grooves to prevent belt from slipping Fits for: Fit any SB Chevy Engine when using a LONG water pump (SB Chevy 265 283 305 327 350 383 400 V8 Engines) Package Includes: 1x Crank Pulley Note: .