1759 Small Block Chevy GM tbi long shaft water pumpFlowkooler pump 1759 fits small block Chevy engines with the taller hub height e. g. engine from 1969 cars and 1973 light trucks and has an un threaded PS boss. The pump has a 16 blade skip vane impeller that is CNC machined from billet aluminum. An increased vane count and a reduction in the plate impeller clearance achieves greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps. It is then surface coated with a