[68c10airstream]

Ken, welcome! I look at times the various chassis choices and if you want the best engineered chassis look at this single item. Usual layout is to move the upper control arm in/out for caster and camber. The best choice it to lengthen/shorten "THE A ARM". This is usually accomplished by threading in/out the inner pivot points on the best systems. The benefit of doing it this way is to NOT induce a bumpsteer issue because the inner pivot points never move in/out.

Old school/less than ideal engineered front end will move a "fixed length" a arm in/out by using shims, eccentric cam washers, or sliding the a arm in/out because the frame has slotted openings.

The "make it handle" thread on this forum spells it all out about bumpsteer. A brief overview is this; the inner pivot points (upper a arm inner pivot=cross shaft, lower a arm pivot= cross shaft, and the inner tie rod end need to be in a straight line. Imagine taking a lazer beam and shooting it over the face of the 3 pivot points and it should go through the center of each in perfect alignment. This also holds true for the outer pivot points, (upper and lower ball joints and outer tie rod end). As little as .050 out of alignment induces bumpsteer, that's not much. Outer pivot points don't move, but MOVING THE UPPER A ARM IN/OUT CHANGES PIVOT POINT ALIGNMENT.

Sorry to say but the new "roadster shop" and their g3 spec cad cam designed state of the art frame uses eccentric cams. If in doubt, read "make it handle" Happy shopping!