1684 1966-1980 Chevy GM 366 427 water pump Mercruiser 3L DODGE W100 PICKUP 74-72

3L DODGE W100 PICKUP 74-72 V8 400 6

5L buick apollo 1975 L6 252 4

7L gmc c15/c1500 suburban 81-79 V8 350 5

5L chevrolet k10/k1500 suburban 1972 V8 400 6

7L gmc r2500 1987 V6 262 4

1684 1966-1980 Chevy GM 366 427 water pump Mercruiser 3L DODGE W100 PICKUP 74-72Big blocks in big trucks need big cooling. We designed the 1684 pump for the 366 and 427 ci blocks. It has an impeller with an increased vane count and a reduced impeller vane clearance to take care of the problem. It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. FlowKooler introduced the first hi flow