[robnolimit]

Good topic. Tall or raised ball joints will have little effect on bump steer, and are usually used to adjust the roll center and/or quicken the rate of camber gain. Adding caster, and thus tipping the spindle back, and raising the outer tie rod end pivot center, can have big effects on bump steer. These types of studs are common, and can be found at Speedway, How Racing, Coleman Racing, and other circle track suppliers. Google 'bump steer kit' and you can find a bunch. Good bumpsteer curves come from the initial design, and can be tuned (slight bump out in compression is best) bad bump curves are a design fault, and usually cannot be tuned out with studs/spacers. Keep pushing the design.