OER Parts offers a wide selection of Dress Up Kits for your 1978 GMC C35. OER Parts offers 1978 GMC C35 Valve Covers, 1978 GMC C35 Exhaust Manifolds, 1978 GMC C35 Intake Manifolds, 1978 GMC C35 Timing Covers, 1978 GMC C35 Water Pumps, 1978 GMC C35 Oil Pans, 1978 GMC C35 Custom Under Hood Mirrors, 1978 GMC C35 Radiator Support Show Panel, and more...