Drilling into the rim isnt an option. And I dont plan on making the cover big enough to touch the tire. I just want to have it go to the lip of the rim. Like where wheel weights attach. But not above that.
http://www.themustangsource.com/time...llittWheel.jpg
So that when im going 70mph the lip of the rim will help prevent it getting thrown off.
edit: Although, I could get those Kleen Wheels brake dust shields and drill into those. Then I wouldn't have to take the covers off to clean the wheels so much.
http://www.allfordmustangs.com/revie...en-wheels.html