SBC Small Block Chevy LWP Black Aluminum 1/2/3 Power Steering Water Pump Crankshaft Pulley Kit. This is a Brand New Black Aluminum Power Steering Pump (Single Groove) Upper Water Pump (Double Groove), & Crankshaft (Triple Groove) Pulley Kit. These Pulleys are designed for your Small Block Chevy 283 – 350 with a Long Water Pump. Constructed of thick gauge aluminum and with a high quality Satin Aluminum finish, this kit would be great addition to your project. This kit also includes a Brand New Aluminum Machined power steering pump pulley. This is a single groove pulley. This fits all GM key-way power steering units through 1984 with a 5/8 Shaft. Double Groove Water Pump Pulley. Single Groove “Key Way” Style Power Steering Pump Pulley. Professional Installation is Highly Recommended.