I have that problem on the Falcon with slicks. Sorry, I just modified the ends of the rocker panels with a sledge hammer. I was at a race, no time for precision body work. That said, there should be effectively zero tire grown with any street tire. I do not have any issues with drag radials as they have pretty much zero growth at speed. My inner lips are rolled and no contact issues. I'd be thinking your rear housing is not centered well or is moving around more than it should.