Stupid Dust Cap Won't Seat

Any of you ever have this problem? I've got 73+ rotors and dust caps that I got from a wrecking yard years ago. I recently installed them on my 66 Dart and I can't get the caps to seat. They fit snug as they should and won't fall off, but for some reason the lip on the cap is hitting the bearing race before the cap is fully seated.

Have you guys every had this issue? Any ideas?

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