i have to chime in. my old zeke ran a 17.8 stock, and this was a ATX. I remember this because it was my first time ever at a track (i was 18) and i got my ass handed to me by a SVT with only a K&N which ran a 15.3 which i thought was fast... lol
i was able to get my zeke down to a 16.997 which was one of it's final runs ever before i ran it into a tree. literally.
i had a FMS header, full custom exhaust to a rice muffler, no trunk stuff, no rear seat, door panels, carpet. custom intake tube, k&n , diablo chip, 13" front tires on steelies, a/c bypassed. some other garbage. in all honesty i was rude to that car for a while but i didn't care.. lol.
also most of the SVT's i saw running at any given time were anywhere from a 15.0 to a 15.4 if it helps (by the way this was in Florida)