[timothale]

The question now would be if the crosmember is canted foreward at the wrong angle, using the shorter arms and possibly longer slots moving the upper ball joint back to get the spindle at the right castor and camber angle MIGHT have the bottom ball joint binding, or too far out of the optimum operating angles. time for more measurements. mabe removing the springs and shocks. move the spindle up and down , checking, that and see if the tie rod to rack angles change enough to induce some bump steer, the 'Fox mustang racers use spacers to move the tie rod for autocross handling.