so how much weight has your car lost so far? 200lbs? 300lbs?
if so you went from a 0-60 time of say 5.4 to 5.1sec. hardly worth the effort on a street car imho.
if you're going to do it, do it like you mean it by making a track car. take out ALL the interior panels out and rest of your stereo, a/c everything.