Have your rollcage guy cut out the front crossmember and put in a tubular one, with a pinto rack. 75#.
Get rid of the tailgate and put in a piece of sheet metal/aluminum that approximates the outer shell curves. I don't know, but that's got to be close to 80#. I would also fab a sheet aluminum bed cover. They add alot of top end stability, and hide the nitrous bottle, battery and fuel cell in the bed.
Get a QA1 bolt in coilover conversion for the front. Lighter and way better hookup. Won't 68-72 stuff work for you?
Speedglass windows everywhere. You can run your windshield wipers on it, but I wouldn't. 50#.
10 gal fuel cell would be the next place to cut weight, but you start losing drivability real fast with small cells.
If you did only one of these, do the crossmember/rack. It will make the biggest difference at the track, and only help the steering response, along with making more room for the motor/oil pan.
