Stock weight distribution for various body styles - can you improve balance w/out drastic mods?

Great info, guys.
How do the different body styles compare relative to their distribution? I have to imagine that a 111” Dart will be distributed differently than a 108” Valiant or Duster.

While this is still great info, I guess I’ve done most of these things already; manual steering swap, aluminum radiator, aluminum intake, tubular headers, mini starter...still eyeing aluminum heads but that’s a relatively big investment (for me at least!).

Is there much weight to be saved with fiberglass body panels? How much does the rear seat weigh in these cars?

As for moving the battery to the trunk, I’ve always imagined moving it to the front of the trunk. In this case, the weight distribution may not be as valuable as reducing the polar moment of inertia when it comes to changing direction. Has anyone tried this? Would this be preferable to the usual right rear corner (where drag racers would put it)?

Speaking of the battery, is there weight to be saved with a smaller battery? I know AGM batteries are pricey but they could save a lot of weight and last a really long time. Are there other options?