64' Valiant steering box + bolts

This fault was not limited to A-body.
Those bolts backed out and fell out. You'll find the bolt holes in your steering gear box wollered over size and you might find little to no threads left in the holes. Many shops have had to cut into the K member to repair the damage. Some have had to repair or replace the gear box also. The bolt holes in the casting should be a very close fit to the shank of the bolt. Mating surfaces should be flat. Good luck with yours.
Chrysler Corp. provided the majority of funding for research and development of a chemical product to bond threaded hardware. These 3 bolts in their vehicles was their focus/reason. Dupont Chemicals won and retail product was named Lock-Tite.