just a little warning, jsut because a car has a few mods or its stock or whatever, you shouldnt' bet on it running that good. we've had 2 cars that both run 15's one only got to make a few runs, could definatly be faster though.
just look at mine, perfectly cared for car, all the little stuff, 37# injectors fuel pump, good chip to go along with it 3" down pipe and a dump pipe, tons of little stuff and i ran a 14.1 last year, granted that was bad air but i was running slower than that for a long time. my first trip to the track gave me a 16.
There are a lot of little thing that can happen to them that will really slow them down, for me it was a bad o2 making me run really rich and a cracked header not letting me build boost fast enough. my 60' times are usualy around 2.4-2.5 the best is 2.3, and thats slow. trap speeds are 102, thats usually a good 13 sec. run, so every car will varry.
and there is almost no such thing as a stock car left now.