Suggestions for light weight would include fiberglass bumper brackets and fiberglass bumpers, plus a fiberglass hood and a fiberglass decklid. These are all available from Crites Restorations, and if my experience is any guide the quality is pretty good. Each part will save you 50 pounds, for a total of 200 pounds weight savings.
If you aren't going any faster than 11.50, you don't need a roll bar or roll cage to meet NHRA tech. Not having that would also save you some weight.