Once you raise it or lower the front end too much the angle increase or decrease of the upper arm may cause the camber to fall outside the limits of your cams.
Raising will cause the camber to go negative lowering it will cause the caster to go positive.
About 1-1/2 inches away from factory specs will render you unalignable regardless of which way you go.
If you raise the back end your caster will go towards the negative side. They may have had to raise the front to compensate for your shackles.