This pic is another reason why i think it could be something 'very close' to the Z/28.
There's the 'tuning fork' style rims motor trend said they saw on the prototype. Not to mention that the brakes have Chevy on them. This is SEMA, if those brakes and wheels were aftermarket, the other company's name would be plastered all over.
Anyone also notice that the fog lights on that car were LED's?? Man that is a nice touch! I love the LED stuff on the Audis, so nice styling cue to adpot!
Here`s a pic of what I`m talking about
:
Also the fit and finish is extremely nice!
Everything on this car looks WAY to well thought out and designed to be aftermarket bolt-ons.
But then again, this is also very likely me over-reacting again :(