Greg Schroeder (sometimes on Cobra Club) has a YouTube video of his car doing a 10.89 with the same car, same motor as mine, but with drag radials.
You can't push 4000 lbs down the race track without drag slicks and HP. Having the extra 200HP on the big end didn't hurt the Stang either.
I don't seem to recall the Stang running those slicks on the road course......