Wheel well is different than above the trans. In a Spyder-like configuration, it has been proven not to work. That's why in a Spyder they are all up front now. Phil knows, he had one of the first(if not the first) Suby Spyder.
Who knows, it may work with the different rear venting.
I think the price is out of line, even though it has all the aluminum on the inside. I think it may be a Thunder Ranch car, Tom had done a few of these just before CCW took over.