For Chevy Small Block 265 283 305 327 350 383 400 V8 Engines. 1x 2 Grooves Water Pump Pulley. 1x 3 Grooves Crank Pulley. for Chevy All Small Block Engine when using a LONG water pump. Made from high-grade iron and rubber, the pulley is built to withstand the rigors of continuous operation.