ET wheels on 69 Camaro question

[HawkX66]

I'm getting ready to clean up my ET IV wheels. I've always had plastic push in from the front style center caps. I wanted to go with more secure and metal push in from the rear type, so I picked up some original caps. They're 3.22" like they're supposed to be, but they seem to be a pretty tight fit. Anyone else running them that can tell me about their caps and how they fit? Here is one of mine.

Thanks.