OER Parts offers a wide selection of Automatic Trans & Components for your 1978 Chevrolet K20. OER Parts offers 1978 Chevrolet K20 Complete Transmission, 1978 Chevrolet K20 Cooler Lines, 1978 Chevrolet K20 Dipsticks & Tubes, 1978 Chevrolet K20 Flex Plate, 1978 Chevrolet K20 Gaskets, Seals, Filters & Hardware 1978 Chevrolet K20 Modulator Valves, 1978 Chevrolet K20 Shift Knobs, 1978 Chevrolet K20 Shift Linkage, 1978 Chevrolet K20 Shifters - OE, 1978 Chevrolet K20 Shifters - Performance, 1978 Chevrolet K20 Torque Converter & Covers, 1978 Chevrolet K20 Transmission Pans, and 1978 Chevrolet K20 Vacuum Lines.