Yes spacers will give you a little more turning radius. As far as the articulation you need to start with figuring out what you have right now. What are the extended/retracted length of the shocks you have. What kind of springs are they. What is the height of your truck ground to center of axle on all four wheels on flat ground. Once you have this information you can figure out what is missing and figure out what you need to change. Remember the more articulation you get the more you are going to spend to get it.
Land Rover 110