If you're interested in a Solstice, there is/was a T2 solstice prepped by Pratt & Miller in Houston. It was one of the fleet used in that "TV Star in a Race Car" series a few years ago..

Under the hood, it looks to have the AC system removed and good size aluminum radiator. Otherwise it apears stock under the hood. It has Koni Sport Shocks and unknown springs and sways.

It's 100% legal for T2 (as of 2011 anyway) and would work in STU with just a wheel size change and installation of a TIR.

Shoot me a PM or something if you're interested and I'll put you in touch with the owner.