Thanks! Just removing those items will make the largest impact. Also, I focused more of my effort towards the rear of the car. While I didn't go nuts lightening my car (it is a sleeper hotrod), here are some examples of things I did to lighten the car:
1) Going from stock cast iron cylinders to Nickies - saved 30lbs (and off the rear!)
2) Stripping the interior (lighter steering wheel, door handles/pockets, radio, speakers, antennae, ashtray, seat, parcel shelf, sides, sound deadening, lightweight carpet, lighter seats, etc) - saved 85lbs
3) Removing A/C - saved 60lbs
4) Aluminum decklid, license panel and bumpers - saved 17lbs
5) Hi-torque starter - saved 7.5lbs
6) Fiberglass engine tin, removed snorkel and air flap, ST cover - saved 7lbs
7) Alloy brake calipers - saved 5lbs
I also have a lighter spare tire, no tool kit, no jack, single battery, no frunk carpet, no water bottle/window sprayer system, SSI's and sport muffler. I stuck with 6" Fuchs all around. Also, I have the early Mag 915 gearbox and stuck with the early Mag case for my motor build, plus a lightweight clutch pressure plate. The MFI pump is heavy but I wanted to stick with MFI
I added weight to the car with larger torsion bars, front and rear sways (T's didn't come with them) and a front oil cooler setup. Could have been even lighter - but I think I need these upgrades!
After these things, it gets more difficult and expensive to lose weight.