Bilstiens or Koni's would be your best bet for autocross....
SVT32VDOHC..... This is just my 2cents, I wouldnt sell hack job or your 96 just to get a run of the mill 03/04 Cobra. Im not a huge fan of 2V motors, but in notch, that is just plain sick, & rare. & your 96 Cobra is cleaner than hell & most likely could beat a pullied Cobra... I love terminators, but they are sooooo common in my area that Im tired of them, plus most of the owners out here with typical modded Terminators think that they are untouchable. Its funny though because once they go to the track they run a 13.0 or 12.9 & get shattered. Just too damn heavy!!!!
Terminator motor in a Notch though, now thats the ultimate stang....