Ford recently revealed a series of tuned Mustangs that are heading to SEMA 2012 next week, but the Stang to keep an eye out for at the Las Vegas event is this mid-engined Mustang customized by Eckert's Rod Shop. Combining the body of a 1969 Mustang Mach 1 with the powertrain of a GT40, the Mach40 is powered by a 5.4-liter engine upgraded with a supercharger and converted to run a flex-fuel system. In other words, this is no ordinary muscle car.