How Much Faster Is A Mustang Race Car Than A Mustang Drift Car?

Race cars are built for the track, so it's no surprise that an American Iron Mustang is going to be faster than Vaughn Gittin Jr's drift car. Race cars, though, are always built with restrictions, so how much faster can it be? » 8/24/12 1:00pm 8/24/12 1:00pm