Wouldn't this depend on where in the wheel wells the tires are hitting? I think we all assume that it is the outer lip because we generally put too large a tire in the wheel wells.
1968 400 Coupe, verdoro green, black vinyl top 1968 400 Convertible, verdoro green, black top 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver)