Well rear seats if you don't want/use them, battery relocation to the back is nice for traction. Aluminum heads not only drop weight but will add some performance also. Those are some of the more common things that I know of, of course you could pretty much strip out anything you want to in the interior to save weight if that is all you are looking for.
__________________ 1988 Mustang GT - 331, hand ported Twisted Wedge heads, TFS Stage 2 cam, R-Series intake, 1 3/4 long tubes, dual 3" exhaust, tko 600, Zex 100 shot, ect.
357 rwhp/ 361 rwtq on motor
428 rwhp/ 484 rwtq on 100 shot
12.48 @ 111 mph on motor (2200ft + elevation)
11.7 @ 120 mph on 100 shot (2200ft + elevation) | 
Need advise for weight reduction in my 1985 Mustang GT 
