Hi. Picked up 2 62 Caddy caps at a swap meet cause they looked interesting and have a big flat spot in the center for mounting bullets. The problem is I can't get them to go on my rims(both 15" of course). It looks like they attach out where the wheel weights clip on but I can't even get them to start. Does anybody know if the Caddy wheels were made a little different from regular steel wheels? I could always hang them on the wall but really wanted to put them on the car. Thanks.