Chevrolet C20 Pickup 1964 Note: From 6/64; Note: Rear Coil Springs; with 1.125 In. Chevrolet C20 Pickup 1965-1967, 1972 Note: Rear Coil Springs; with 1.125 In. Chevrolet C20 Pickup 1968-1970 Engine: 4.1L L6 Engine; Note: Rear Coil Springs; with 1.125 In.