Get rid of the independent suspension.
Get rid of the Air Bags.
Get rid of the passenger and back seats.
Get Fiberglass hood and trunk.
Replace the windows with Lexan.
Only run ¼ tank of gas.
Make sure to work out so you can trim off any excess body weight.
I mean really….are you that worried about 500lbs?
These cars are turning great numbers on the track with that weight. If you want a race car they sell the Gen 5 body and you can build what you want.
If that doesn't work for you then I would recommend you go buy a mustang or stick with your ricer.
BTW: I personally take offense by you calling a car that we all cherish here "A PIG". I know they're heavy but you could use a better choice of words here. Just my opinion.