Thanks for joining up
Sounds like you have a great car, can't wait to see it. As far as the tune goes I would recommend Mustang Magic in Suffolk County. They have tuned a lot of members' cars here, including mine and will give you a safe tune with respectable #'s. They're a New York Mustangs sponsor and you'll get 10% off for being a member.
You can get in touch with the owner Joe here: http://www.NewYorkMustangs.com/mustangmagic