Hi, this is my first time on this site. But to answer your question, you really should just trade your V-6 Stang in on a new 07 GT. The amout of money it would take to make your car run with a GT would be great!
And after you managed to do it, " if you could " you would have a car that no longer is the dependable ride you have now. If you have an 06 Stang now, run down to your dealer, and drive a new GT.
After that, you wont have any more questions. By the way, your a major hottie!