Description: 

Water Pump Pulley Double-Groove SWP Short Water Pump - Compatible with Small Block Chevy SBC 262 265 267 283 302  307 327 350 400 Semi Gloss Black Steel

5/8" Center Pilot Hole 

Will NOT fit Corvette water pumps or early stock Pre 1973 GM trucks Pumps

P   Professional Installation is Highly Recommended (No Instruction and Wiring Diagram Included)