1977 Chevrolet Impala Engine: 4.1L L6 GAS; W/O A.C.; Position: Fan and Alternator;. 1978 Chevrolet Impala Engine: 4.1L L6 GAS; W/O A.C.; Position: Fan and Alternator;. 1979 Chevrolet Impala Engine: 4.1L L6 GAS; W/O A.C.; Position: Fan and Alternator;.
