3.73's, PT4400, and some sticky tires will get you mid 11's (11.40's ish). A looser/more efficient converter will REALLY wake up the car at the strip. Of course you'll need sticky tires to hook it up. Are you still running 2.73's?
if you are still running 2.73 gears there is about 4 tenths going to 3.73s. i picked up 7 back when my car was running in the 14s. of course the faster you go the harder it is to pick up a bunch on one single thing. i would think at least 4 tenths for the gear swap.