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

Unfortunately no. It is a bit of a Pig. I have to weigh it but it certainly isn't the lightweight choice. Someday I'd like to put in a full floating quick-change rear. but that isn't in the budget currently.

Yeah, good point about the weight balance. There are a lot of other things I can do in the front though, lightweight battery, Aluminum heads and brackets, obviously the hood and bumper. Have to balance lighter overall with F/R balance. I will be keeping a trim but livable interior. probably deleting the rear seats though. I do like the center consoles but could probably make a featherweight one with a similar feel. I really need to get a set of scales so I can work on the balance as well as the overall weight.

Concentrate on front weight. Put seat to back of list. Helps keep road noise down too.