Most of the cars at SEMA are impressive. This one is so incredible that they wouldn't allow it to hang out in the Ford area... because Ford can't make cars this incredible, and didn't want to hear from every single person that saw it how Ford ought to build cars as cool as this Mustang/GT40 melding, the Mach Forty from Eckerts Rod and Custom and Hardison Metal Shaping

 to have the rims resemble the Mach 1 rims is very cool

I don't get why this wing was up, but maybe it's to demonstrate that it exists... if it weren't popped, we'd never realize it's there