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

One more thing.....some of those gear box bolts are beveled under the head area to match a female bevel on the gear box. It was a good idea. Much like a wheel nut and how it mates to the wheel. Why the hell Mopar didn't do that to all of them? I have no idea. But I have only seen a few like that....and of course on those you could not use a lock washer.