DESCRIPTION --High-volume aluminum long water pump, satin finish. --For Chevy Big Block 396 402 427 454 502 engines. --Mechanical water pump. --Welded 1 3/4" inlet port for lower hose. --Standard rotation, including gaskets. --The billet body and impeller provide tight clearances for excellent flow characteristics. --The pump will clear cam belt drives and most blower drives. --Great for racing or direct factory replacement. --Package: Including all items in the pictures. Note: Professional Installation Is Highly Recommended (No Instruction Included).