Piers14 races his 2g regularly. He has a fully stripped interior and I believe he just cut out the spare tire well to remove even more weight.
Old picture:
His interior. Not sure how old these pictures are.
More here (MX-6 on the scales)
Weaksauce has a 2g that's pretty well set up to be a race car or track car. He also has a stripped interior. I believe he has removed around 400 pounds from his car.
I'll be joining the stripped interior club soon too. I have my dry ice waiting for tomorrow morning and I will be removing the heater core and everything else behind the dash. The cage will be a while though.