Engine Compatibility — Designed for Compatible with Chevy 230 and 250 inline 6 engines to support reliable cooling system operation. Cast Iron Construction — OE-style cast iron pump body provides strength, durability, and long service life under demanding conditions. High-Volume Flow — Mechanical water pump design delivers consistent, high-volume coolant circulation for efficient engine cooling. Hardened Bearing Shaft — Features hardened shaft and OE-style bearings for smooth operation, even wear, and improved durability. Precision Machined Design — Precision machined hub and OE-style impeller help ensure smooth performance and dependable coolant flow. OE style impeller delivers stock coolant flow rate. Hardened bearing shaft for even wear and durability. OE style cast iron pump body. Precision machined hub runs smoothly under heavy loads. OE style bearings.