Where to go from here.

Ok guys I have been greatly disapointed by my track times lately Iam not sure if it is me or something with the car I need to look at.
Iam running a 1996 cobra. I have 4:10 gears, K and N fipk ford raceing alum drive shaft, Summit brand upper and lower control arms, mac pro chamber H pype also running the new Nitto nt05r's 275/45/17's this week end and I do have a tuner with custom tunes from american muscle. I went to the track this weekend and with the custom tune the best I could hit was a 14.5 and I ran this 3 times. I then retuned it to stock and was able to get it down to a 14.1 trapping at 98.45. I felt like I was getting good traction off the line but my 60 foot time was 2.05. The car seems to run good but this is the best time I could get out of her. Iam shift at 6900 and launching around 3500. I have cleaned my IRMC's and changed the plugs and wires. Were should I go from here to help my quater mile times? What mods should I be looking into? I have read many times that the cobras running low 13's with gears but I cant even break into the 13's with it. Any help would be awesome.