1975 Chevrolet C20 Engine: 7.4L V8; Position: Air Conditioning;. 1976 Chevrolet C20 Engine: 7.4L V8; Position: Air Conditioning;. 1977 Chevrolet C20 Engine: 7.4L V8; Position: Air Conditioning;. 1978 Chevrolet C20 Engine: 4.1L L6; w/o A.C.; Position: Fan, Power Steering and Air Pump;.
