If you take the time to blueprint it, usually by shimming the box and/or ovaling the idler arm holes (weld washers when done), it is amazing how low you can get the bump steer.
I was online with a British-Midlands F1 engineer during some 4-post tests on a B-body a while back. He was amazed to learn that this "near ideal' (his words) suspension geometry was on a stock '60s US sedan!
Incidentally, it is well known that the '73-up A-Body K's has incredibly lousy quality control, as stated, they were all over the map! I could tell you a story...
Rick
