How much weight can you shave off of an A-Body...and still have it look/drive like an A-Body?

I would skip the carbon fiber stuff. Not cost effective

I think glass hood is bigger benefit than fenders. And glass fenders need headlight bezel and bucket fitting.

Not sure an electric parking brake is lighter. A-body parking brake is pretty simple. The cable has some weight.
Yeah, if I was buying then I would agree on cost for the CF. If I can make some parts of my own then it makes a lot more sense.

I agree the hood and trunk lid alone can drop a bunch of weight.

The electric parking brake I was looking at is the 2020+ explorer/interceptor/aviator rear calipers. They would replace the caliper completely and the handle/pedal, cables and all. Plus, I would be able to remove the inner parking brake drums on my existing setup. Just need a little switch to turn on so that's a couple oz of switch + wiring max. I'm sure I can save a few lbs while getting a braking upgrade and minimizing some clutter underneath.