Compatible/Replacement for CHEVY SMALL BLOCK CHROME Optimal Belt Alignment and Enhanced Power Transmission. The pulley's machined finish not only adds a sleek, professional look to your engine bay but also signifies the careful attention to detail and quality craftsmanship behind its production.Installation. OEM Style Crankshaft Steel Pulley Double Groove Small Block Chevy (Short Pump Applications) Will also work on 348-409 with standard water pump. 6 /34 Diameter" Camaro Small Block Chevy 1-Groove Long Crank Pulley; Machined - Free Diameter: 6-7/16 Depth: 2-1/2, Black Finish , Two Grooves , Big Block Chevy , 396-454 Engines , Short Water Pump CFR Performance Black finish steel two groove crank pulleys. Its two-groove design ensures optimal belt alignment and traction, minimizing slippage and enhancing power transmission from the engine to the accessories. CFR HZ-9479-C Chevy Small Block Aluminum Chrome Water Pump Pulley - 2...