Originally Posted by Granpa

Frankly, I wouldn't waste any time doing that. Now this is just a personal feeling and others may disagree, but the built in slop will save the steering linkage a bit. I used to shim by putting thin shims above the bearings, but was tweaking the bell cranks more often than those who didn't. For some reason, the slop doesn't affect the steering nearly as much as a tweak in the steering linkage. Also, if you shim the slop out, it makes it even more important that the linkage is perfect.

Hint: if the car is fine on one run and goes "crazy" the next, you've tweaked one of the bellcranks. Nine times out of ten, it's the right one.