Did mine a little differently, I tried to keep the clips in their original position on the wheel spoke.
This shows an original 1950, 3600 split rim clip with a vendors repro clip next to it. As you can see they are to short to grasp the hubcaps if place in the original position on the hump between the holes. So I used a spacer to get the correct height:
http://www.pbase.com/dennygraham/image/117149892 These were the replacement ‘80 Chevy ¾ ton tubeless rims I picked up from the scrap yard:
http://www.pbase.com/dennygraham/image/117149816/large This shows the original 3600 hubcap on a late model (’80, 3/4t) rim:
http://www.pbase.com/dennygraham/image/117147131/original This shows the clip in the original location with the spacer under the clip:
http://www.pbase.com/dennygraham/image/117147209/large A blurry but better view of the spacer and location:
http://www.pbase.com/dennygraham/image/117149791/largeDennis Graham
Sandwich, IL