Car sounds absolutly spectacular! Nice deep growl and no raspiness. I also like how it does not seem to have much poping when letting off.
Now since the only real change was long tubes (had a high flow H before, right?) and the car is not blown then you dont need a new tune. I bet ya that if you dyno it the tune that it will only see 2 hp with the tune and that the A/F is more then safe to rev it WOT all the way to the limiter in any gear.
Dig the shifter too. Beautiful Stangs like yours really make me miss mine alot.