Moving rear axle back

I'm not diggin my MP suspension book out, cause I don't give that much of a crap anymore, but there's "something" in there about the intentional short segment in the A body. I don't remember "what" but they talk about it being an advantage somehow. Maybe if my give a crap o meter goes up a little more, I'll dig it out, but probably not.

Are you talking about that the front section of spring is quite stiff, helping to control wheel hop etc?