61 was a changeover year. I believe that 3/4 ton wheels still used clips, and half ton 4x2 and 4x4's used nub type wheels to take a standard hubcap. So there are several types of 1961 hub caps available. Old school type for clip wheels, standard type for nub wheels, special 4x4 front axle type hub caps, 3/4 ton hubcaps and then pick your flavor-chrome or painted. The Corvair trucks used the same hubcaps on their 14" wheels as well.