SBC Small Block Chevy SWP Polished Aluminum 1/2/3 Power Steering Water Pump Crankshaft Black Pulley Kit. This is a Brand New Black Aluminum Upper Water Pump, Lower Crankshaft, & Power Steering Pump Pulley Kit. The Water Pump Pulley is Double Groove while the Crackshaft Pulley is Triple Groove. This kit is designed for your Small Block Chevy 283 – 350 with a Short 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.