K member blind nuts

If you still have the slant 6 K you might just graft in majority of the steering gear foundation. Area a little larger than the gear box foot print with all 3 nuts on it.
I've seen thread here where owners poke shims under the gear box at 1 or more bolts, change the pitman angle, whatever reason. I don't know how the heck that stays tight. These 3 bolts working loose has always been a issue. Good luck with it whichever way you go.