1) This is a brand-new polished aluminum crank pulley. 2) This is a single-groove pulley designed for your Small Block Chevy 265 283 305 327 350 383 400. 3) The pulley is only for a short water pump. 4) Pulley Diameter: 6.5625" 5) Pulley Height: 0.75" 6) Bolt Pattern: 2.75" 7) Center Hole: 1.125" 8) Package includes: As shown in our pictures. This Item Doesn't Come With Installation Guides. We Highly Recommend Professional Installation.
