Re: x-over steering alternative?
What you are describing doesn't sound like bumpsteer, it sounds like loss of steering as a result of axle articulation during wheeling. Bumpsteer is the problem I just recently had and fixed. When driving down the road at 20+mph, your truck hits a small bump, this causes the steering wheel to rip out of your hands and turn clockwise 1/4 to 1/2 turn, then snap back. This is bumpsteer. Your suspension is only deflecting 1/4 to 1/2 inch. It shouldn't be articulating more than that on a paved road. As the spring compresses the steering wheel goes to the right, as it decompresses it goes to the left, as a factor of the geometry of the steering box, draglink length, angle and steering arm height.
Off road, with a loss of steering, yes, draglink length is a factor - hence x-over steering - longer draglink so to speak. On a truck with less than 6 inches of lift this and bumpsteer should not be an issue. If they are, there is another problem.