Well all of your help is pointing me in the right direction. I found this quote from
Some Imperial Website "The pseudo-alloy wheel referred to is probably the "road wheel" option that was offered from about 1971 and with revisions through the end of the full-size era in 1978. To me, they look fabulous on a '76-78 New Yorker Brougham but wrong on a '74-75 Imperial. Of course these are the same car, but in my heart I know Mother Mopar never offered them on the Imperial so they don't look right to me. They are simply argent-painted dished steel wheels with decorative trim rings and center caps that leave the chrome-capped bolts exposed. You could get these only on C-bodies (Polara/big Monaco/Royal Monaco/Gran Fury/etc.) and luxury B-bodies (Cordoba/Magnum/Charger), I believe."
Well maybe these were ordered with the car. I found the build sheet behind the back seat and the thing fractured to pieces, I guess I need to put it back together. Thanks again for everyone here, I like the center caps the best.