While OJ is correct to raise the consideration of squat and lift, the description he gives of how to deal with it is not correct. What he describes applies to an independent rear suspension system, while what is considered here is a solid axle on control arms, the control arms being the rear sub-frame and the suspension instant center being the sub-frame pivot point. The relationship of the axle centerline and the pivot has nothing to do with the squatting characteristics if the axle is attached to the sub-frame.
Any time forward tractive effort is applied (at ground level), the reaction will be to raise the pivot point, and consequently the chassis. The only way to mitigate this reaction is to lower the pivot point, giving zero lift when it is at ground level. Likewise, any rear braking will induce squat to the chassis.