How to make sure steering box doesn't loosen up?

I'm guessing you could tweak the lock washers to make them grab a little more. When I swapped my steering box, I though they were regular flat washers until I cleaned them. :lol: ..I also had some k-frame flex after I put the big tires on the front, not bad, but enough for me to weld seam weld it and add a gusset or two.