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

The center of gravity of most American production cars is the back edge of the front seat when the seat is in the rearmost position . It is designed that way so the braking will be balanced and so the car won't kill you if you have 6 people in it and a trunk full of luggage . In my case I removed the power steering (heavy), power brakes , A/C compressor/condenser , 24lbs of undercoating , 318,904, 8 1/4 . Replaced with 383 , 727 , 9" With a 6pt roll bar and 5 gallons of Lizard Skin . I'm thinking I'm about 200 lbs heavier on the nose . which can be adjusted with weights in the trunk . "Raising the ride 1" puts 100 lbs of weight on the opposite corner ."