1990 Chevrolet C2500 Engine: 4.3L V6; w/ Orifice in Condenser;. 1990 Chevrolet C2500 Engine: 5.0L V8; w/ Orifice in Condenser;. 1990 Chevrolet C2500 Engine: 5.7L V8; w/ Orifice in Condenser;. 1990 Chevrolet C2500 Engine: 6.2L V8; w/ Orifice in Condenser;.