Dude my 97 vert is stock except for K&N and I ran a buddy from work in his 91 GT with 3.55s and h-pipe and I walked him like he was standing still(from a roll). I did the same to another 5.0 a few days before that. The Cobras do pretty well. I would expect him to beat you with that light of mods. With headers and h-pipe I'm surprised it was that close.
------------------
Rick
My 89lx(updated 2/21/2001)
My 97 Cobra