I just had a couple of looks at the TB on my '05. The Shelby 500 version shown in that picture definitely has a different exterior setup. The two little bosses over each throat are higher and the throttle plate motor control is set at a different angle than the '05 GT. The two top mounting bolts look to be about the same, but there may be some quirky differences that you can't see in the photo.
$215 sounds like a pretty good price for the thing. But, there's no telling if it would fit, or work. Also, would it give you any improvement? I would guess not.
It is kind of intersting that they went with a single tube strut-tower brace. That might be worth checking the price of as well.