Your assumption is the next "Hyperstang" will be called GT500. It could be the next Cobra or even Mach 1Although the Mach 1 was a product of re-cycling many exiting parts, the engine was not one of them. It is not the unused dog engine that was destined to be used in the 02 Cobra. That comes directly from Scott Hoag who designed both the '01 Bullitt as well as the SN95 Mach 1. And the side scoops are standard Mustang, if you have Termi inserts, someone replaced them. The C-pillar and quarter windows were Bullitt sourced, and the seats were Cobra based. There were many unique pieces as well, but there were budget constraints which kept things like Cobra Jet scripts off the shaker.