1989 Chevrolet R3500 Engine: 5.7L V8; Position: Fan and Alternator;. 1990 Chevrolet R3500 Engine: 5.7L V8; with 43-1/3in Long Belt; with 94 Amp Alternator; Position: Fan and Alternator;. 1991 Chevrolet R3500 Engine: 5.7L V8; without 120 Amp Alternator; Position: Fan and Alternator;.
