Trim rings for 6" wide Rallye Wheels

If you are talking about our A-body factory ralley wheels, they are only 5 1/2" wide. I bought some trim rings that were for 6" and they wouldn't seat all the way.

I plan on getting some 6" rallye wheels for the front thru Summit. I currently have 15 x 7's on the front and want to go skinnier on the tire width.