looking to lower rear of 1970 Chevelle

[Greg Barsamian]

Not familiar with the Morrison kit, sold a number of the BMR Xtreme sway bars similar to the H&R bar. "A" bodies normally sit lower in the rear.
Were the rear springs changed? if so the ones you have may be taller?
I would double check to see if the Morrison kit is limiting suspension travel?
and double check the links for the "anti roll" bar,