I bet the rigs with that kit steer like poo. The ackerman angles are no good. When you draw an imaginary line from the center of the rod end through the upper ball joint on both sides, the lines should intersect at or near the "CENTER" of the rear diff. With that kit, the lines will not intersect at all, and will be outside the rear tires.
Why is this important, you ask?
The relationship of rod end to the ball joint is what will make your inside steering tire turn sharper than the outside tire. The inside tire needs to follow a smaller radius than the outside tire, when making turns. It's all about the rod end's path or radii around the ball joint and the rod end's starting point in the radii. Since the inside tire's rod end is further toward the outside at it's starting point, it will turn sharper because it falling toward the back of the vehicle, where the outside tire's rod end is pushing across the front of the raduis, causing the inside tire to turn sharper than the ouside tire. God, I hope that makes sense!
With the "kit" it will wander, and feel like really bad bump steer. I've got personal experience with this (not the kit, but a similar set up) and it took a lot of reading to even get a hint of what was going on. To be honest I thought the problem was with my bias ply Iroks, when I stumbled on the Ackerman theory, purely by chance. I have since redone my steering set-up, and it drives 1000% better.
-Dan
