1967 Chevrolet C20 Suburban Engine: 4.6L V8;FuelSystem: 2BBL; Composite;. 1967 Chevrolet C20 Suburban Engine: 5.3L V8;FuelSystem: 2BBL; Heat Passage Cutouts; Composite;. 1968 Chevrolet C20 Suburban Engine: 5.0L V8;FuelSystem: 2BBL; Heat Passage Cutouts; Composite;.