[mud.man.rj]

Stock is nice, but in your case the rear springs especially look a bit bagged out and if you lift the rear only to level it the front will drop down a bit, you know the fulcrum principal. Lift it what you think looks good for what you will use it for. I would lift it 4" and then you have a bit of extra tire room for a taller tire for diff clearance and better new springs to take a load when hauling anything. Remember the old springs are "old".