I'm hoping some fellow '67 Cadillac CC owners (or anyone who knows) can tell me which commercial chassis rims are correct for my car. I had all four rims off to have the tires balanced, so I could put the wheel covers on, and came to the realization that my car has four different rims. One rear one is non-riveted, and one front is riveted, but the outer lip is about a 1/4" to big for the wheel cover to grip. Of the two remaining, both are riveted, but when mounted on the car, one has the rivets showing, and one has the rivets turned inward - which one should I be trying to find four more of? (I'm missing the spare, as well.) I checked the parts book, and it shows several different CC rims, depending on year, but doesn't show the differences. Thanks.