Pirate Mfg Sb Chevy Short Water Pump Black Steel 2 Groove Pulley Kit 283 327 350 V8 Brand New Black Steel Pulley kit This kit will work on all Small Block Chevy Motors With a "SHORT" water pump This Water pump pulley is 6.40" diameter and is 2-3/4" Deep Measuring From Front To Back This crank pulley is 7.30" diameter and chrome bolts are also included This kit will not work on early 265-283 engines with riveted on pulleys and also Will not fit Corvette water pumps or early stock GM trucks