Brake residual valves?

[svr]

Laying out my new brake plumbing and want to make sure my mind is thinking right. C4 calipers on all 4 corners, Mustang hydroboost mounted under the floor stock location, planning on a remote reservoir up on the fire wall well above the master. Question is do i need 2# residual valves in both front and back with the reservoir mounted up high? I have a Wilwood adjustable prop valve that both front and rear lines go through. Thoughts from brake specialists please. Thanks