1-Groove Water Pump Pulley 1) Fits SBC Chevy 265 283 305 327 350 383 400 using a long water pump. 2) Finish: Polished 3) Material: Constructed of thick gauge aluminum and with a high-quality polished aluminum finish. 4) Shape: Round 5) Size: The pulley diameter is 6 9/16". The pulley is 2 1/4" tall. The bolt pattern is 2 1/8". The center hole is 5/8". 2-Groove Crank Pulley 1) Fits SB Chevy 265 283 305 327 350 383 400 using a long water pump. 2) Diameter: 6 9/16" 3) Tall: 2 3/4" 4) Bolt Pattern: 2 3/4" 5) Center Hole: 1 1/8" 1-Groove Power Steering Pump Pulley 1) Single Groove Pulley Design. 2) Material: Aluminum 3) Surface Finish: Polished 4) Bolt-On Keyway Pulley 5) Measurement: 5 3/4'' Diameter 6) Center Hole: 5/8" Diameter 7) Fits Chevrolet, Oldsmobile, Buick, Pontiac, And Cadilla.
