Just read an article that says the Mach 1 will get the Tremec from the Gt350 and multiple coolers, diff, trans and oil. This thing will basically be a Gt350 with a coyote engine. Some suspension goodies from the GT500 as well.
I like the idea, and like the Bullit is better than a regular GT, the Mach 1 will be a better GT. As was the Boss. If they swap the MT82 for a Tremec and add some coolers it'll be a great track car like the 350.