1963-1967 C10 Panel Base 4.1L 250Cu. In. l6 GAS Naturally Aspirated 1963-1967 C10 PickupBase3.8L 3769CC 230Cu. In. l6 GAS OHV Naturally Aspirated
1963-1967C20 SuburbanBase4.1L 4097CC 250Cu. In. l6 GAS OHV Naturally Aspirated 1963-1967C30 PickupBase3.8L 3769CC 230Cu. In. l6 GAS OHV Naturally Aspirated