[Diesel_Dave]

As far as the smooth hubcaps, I've though of (but not built) covers attached by coupler nuts to the wheel studs. Many wheel studs, including mine, stick out past the lug nuts. I'm thinking you should be able to attach the covers that way without removing the lug nuts. If you couldn't get coupler nuts you probably could use regular nuts and some threaded rod. Might want to use some loctite too, to make sure they don't come off.