2003 mustang gt 4.6 liter running vortech procharger v2 running rich any help would be appreciated

How would I go about finding if it's been tuned or what kind of tune ??What you should be looking for are signs of a [digital tune].
Whether it's a chip or piggy-back system or whatever they did...
Yeah that's what thinking to it looks like it's a pretty old sct tuner
Ok I found out today that my 03 mustang gt with a v2 vortech procharger.... I took it to a tuner and they found out my computer is locked with a sct tune and the hand held tuner box does not work and to make things worse is who ever had all the work done to this mustang my tuner guy found out they stuck a 07 computer in it and it can't be tuned with that in there he said I would need the stock computer in it ... where would be the best place to obtain one and how would I know if I am getting the factory computer ??How would I go about finding if it's been tuned or what kind of tune ??