Larry-- you mean play between the steering cylinder end ("rod cover," #4 on the parts diagram) and the plate ("cylinder stay," # 11), where they fit together?
Compare it with the pic of mine, which shows the right side. Mine are both very tight, with no left-to-right or up & down movement. Has yours got rust around it? Any clearance around the plate's round hole that you can see? Where'd they put the "extra" plate, on top of the original?
Looking at the parts book and the service manual, it looks like the only thing that holds the cylinder in place (up/down and in/out, from front) is the hole in the plate fitting tightly over the round (with flats) rod cover- there's no other connection that I can see. It looks like left-to-right (longitudinal) holding is accomplished by the length of the cylinder, against which the plates exert pressure when they're both bolted in, "squeezing," in effect.
Perhaps improperly torqued bolts a long time ago? Or, could it be that the rod end, which threads into the cylinder, is for some reason in far enough that the cylinder is essentially "shorter," which allows for some slop between the plates? (worn internal parts?)
I can't believe the mounting locations on the cast axle would move...but the mounting bolt holes mate to a machined flat surface on the casting; perhaps a boo-boo there, as in not quite enough metal removed?
At least it looks like most of those parts can be had individually! Let us know what you find- sounds like others may have this issue, too.