stock auto your looking at anywhere from 14.2-14.8 I would say.
With some 4.30s, little tuning, and tire you can knock off a huge amount of time with these auto cars
my 96 auto went mid 14s with 3.73s and consistent 14.0xs with pi intake and a few bolts on with the 3.73s...that was still NPI heads and cams though
Add a PI 3200 converter, 4.30s, tune , and some drag radials and that stock 99-04 auto will haul pretty good ass