I checked the Jim Carter site and their clips are listed for 1/2 ton only. I have a couple off a passenger rim, which I think are the same as the 1/2 ton size, and they are too short to reach and hold the lip of the hub cap.
1959 Chevrolet 3800 Pickup 1937 Chevrolet GC Panel Can you still call it a barn find if it's your barn?