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

66 Barracuda 273 - 55.5% front, 44.5% rear
67 Barracuda 273 - 55% front, 45% rear
Other A bodies?
Not measured, from articles.
That's not even close to 50/50, if you actually weigh them, there not even that good. Don't trust some magazine article.