1971 Chevrolet G10 Van Engine: 5.7L V8; with 44-1/2in Long Belt; Position: Fan and Alternator;. 1971 Chevrolet G10 Van Engine: 5L V8; with 44-1/2in Long Belt; Position: Fan and Alternator;. 1972 Chevrolet G10 Van Engine: 5.7L V8;EngineVIN: E; w/o A.C.; Position: Fan and Alternator;.