Late to the party here
Yeah the turning radius on the single a arm lifts is kinda lacking. It's just the way the knuckles and a arms are situated.
One thing you can do is make sure you have the pitman arm centered. When you turn lock to lock, check the angle of the tire. If one side is turned more than the other you might have to recenter the pitman arm. That's about all you can do, assuming all the parts are working correctly.