It was cool back in the day when we were all on the same tire, you could bounce back and forth between asphalt and dirt without having extra sets of tires.
Those days are long gone. USLC gave us dirt racers a dirt racing tire, and the racing has improved greatly, not only has it made the car faster and easier to handle, it is safer as there are less one car spins (at least in my observation).
Since the line has been set between racing surfaces, I think the asphalt guys deserve a racing tire also. If extra gussets are necessary in the rear, then so be it, its in the name of safety. A 13" race tire will be cheaper than the Federal (well, until USLC puts their stamp on it), and there will be no need to send out for camber cutting.
Just my hillbilly dirt racer opinion