You have a lovely looking clean car with many desirable features. If everything that was fitted from the factory works as it should, the car would sell in a heartbeat. The problem for you is that you wouldn't recoup anywhere near the expense you put into it, and the problem for the buyer is that the insurance company would still ascribe it the same value as a stock '07 GT. Your car would command a price somewhere in between that of a stock '07 GT and a stock '12 GT, and will appeal to a niche market that lusts for the combination of the '05-'09 body style and Coyote engine. The T56 and aluminium driveshaft are the icing on the cake.
As I said to you earlier, hang onto the car for as long as possible and enjoy it. Maybe one day you'll go to a car show and the right buyer will appear out of the blue. Personally if it was my car, I'd keep it till I die.