My bad I completely forgot the GT was rear engine, damn, if it weren't, well, it woudln't be the car it is, and I wouldn't recommend it. I guess the Vette would be good, they're great on the track, just never bother owning one, they're terrible otherwise, but that has no effect on the game itself. All in all, I think a top of the line Saleen Mustang would do just fine, along with the Z06. Vipers, ehh, just too sloppy for me, I only got to drive one once, it was a mid 90's RT/10, it had like 25k miles on it, and it fealt like it was falling apart. It was very unforgiving, it fealt like a fantastic engine, with the rest of the car thrown together from junk yard parts. I dunno, hard to explain, just my opinion tho. I feel a Z06 or Saleen would be far superior.
But if there's anyway to get a Ford GT into this sim, wooooh, I would be going nuts. The power, the balance, just, perfection. American power with european suspension, brakes, and well, everything else lol.