Maybe I'm mistaken, but I do not recall the GT being promoted as track ready. As best I can recall, I only saw Dark Horse variants advertised as track ready. I think Dub called it right. If you want to track your car, go with the Dark Horse or plan to spend on mods.
Dealer in Florida had 2 DH allocations. I got the last one back in May for $67.6. Received order confirmation from Ford, but no VIN as of today. I checked with sales Rep, he said to expect production delays until Oct for DH. Not sure about GT.