Looks like it might have some rear steer with vehicle roll on corners. I would think the lower bars are going to change the wheel base side to side if one side goes up and the other side goes down or even more dramatically if one side moves up or down and the other side doesn't. I believe I would want to watch it as things move about. Stands under the chassis, 2 jacks, one on each side of the axle, start jacking things around and take measurements. Then all you need to decide is how much change is acceptable. Gene