The "base" level GT has 627 hp, but should you feel the need, Shelby can push it a little further with an optional package that lets you join the 700 club. The entire suspension's been overhauled in coordination with Ford Racing's engineers, and can be further upgraded to transform the car into an out-and-out track monster, complete with cooling ducts for the brakes.
It's not exactly cheap, with the base price starting at $39,000...above the price of a Mustang GT. Then again, it might just be faster around a track than the new GT350 R.
Aaron Miller is the Rides editor for Supercompressor, and can be found on Twitter. He certainly wouldn't mind taking a few hot laps in one of these, if Shelby were gracious/dumb enough to toss him the keys.