I personally like the GT-R, but I don't think it's on the same level as a Z06, (as far as straight-line performance is concerned at least), both modded or stock. There are people running low 10s@138-140mph+ in C6Z06s with a small shot of gas, mild cam and simple bolt-ons. I just don't see a 3800lb, turbo'd V6 pulling off those kind of numbers with the same amount of coin invested into it.
not only will it do that...and more, it will do it without going INTO the motor