I've been dealing with sloppy steering for 3yrs now.
I'd say that allmost allways, it's something else, not the steering box that contibutes to excessively sloppy steering. Mainly the rag joint. After that, I'd look at kingpins/balljoints, then tie rod ends. Then, and only then, start messing with the lash adjustment. It supposed to take 18"lbs on the input, to get movement out of the output. That's with the steering shaft and the pitman arm removed. Think about how much 18inlbs is. A little more than finger tight
I'd bet that most peeps that mess with the lash adjustment, tighten it to much. Which leads to wandering steering.