I have and it's really not much. My friend has nitrous on his v6 stang (100shot) and ran a 13.9. Didn't "feel" too different, speedo was just going faster. (then again his was auto and you dont feel speed as much with autos)

 

im not to sure where to get one for a 97... look on jets website and hypertech or some others to see what they say. if you want my 2cents, dont do nos. thats just IMO so please nobody jump on me. You might look for a tuner program to put on a labtop. those work the best i think.