Nope, you've got it right there. To make a caster adjustment without affecting camber, take a shim out of one end, and install it in the other, like moving a shim from front to rear, or vice versa. The tip about checking on which steering gear was used is also a good one- - - -some of those Saginaw boxes have a tall center tooth on the sector gear that gives a very fast response as the wheel is moved off center, and a slower rate as the limits of travel are approached. If the center point of the steering gear is not adjusted properly, there will be some slack when the vehicle is traveling straight ahead and you'll have to "herd" the truck down the road. Finding the center point and adjusting the sector preload for a zero-clearance situation while driving straight ahead is the very first thing to do during a top-quality wheel alignment job. With most of today's vehicles having rack and pinion steering, a lot of so-called "alignment" guys have no clue how to do that!
Jerry
