Michael;

I used the CD clips for my 57 on a F*&% 16x7" wheel with the stock hub cap and they worked fine. I just located them so that they were the right diamater out; drilled a 1/4" hole and use a stainless bolt to attach them. I then finished it off with a SS trim ring. Everyone who sees it thinks that it looks great. Here is a link to how mine turned out.

http://www.chevygmcofkc.org/Gallery/showphoto.php?photo=1374&papass=&sort=1&thecat=511

Let me know if I can be of more help.

57 Mike