1968 Chevrolet Impala 5.0L V8 GAS. 1964-1968 Chevrolet Impala 5.4L V8 GAS. 1962-1968 Chevrolet Impala 5.3L V8 GAS. 1958-1967 Chevrolet Impala 4.6L V8 GAS. Notes: Water Pump (Standard). Quality-assured with 100 percent leakage and functional tests of seals, bearings, castings and fully assembled water pump.