The frame on my '79 C-10 Bonanza cracked there !--I started hearing a loud "SNAP" at full lock turns once in a while,then one day when I had a friend handy I had him turn the wheels to full lock both ways while I watched to see where the noise was coming from..
--I thought it was loose rivets in the crossmember that holds the sway bar in place--there were a few sheared ones,but it was the steering box at the frame that made the snapping noises,the frame had cracked and the two pieces where the crack was would pop free during a hard turn..
I was surprised to see a 2WD truck crack the frame there...but it isn't uncommon,I had a '74 C-10 with a 454 factory that also had been repaired there...the Bonanza only had a 250 straight six,so its not like it had a lot of weight on the front end..
I took the truck to an experienced welder who did pipeline work for decades and had the reputation of being able to weld "anything",and not have it come apart again...he took the steering box off and tied it out of the way and stitched up the crack and ground it back down,and bolted the box back up with some 1"x 1/4" flat stock around the bolt holes on the back side under their heads and welded them on too..it never gave me any further grief after that...best part was he did it for $50,and it only took about an hour..