1951 1/2 ton (stock).
Steering felt loose. Crawled under and found the castellated nuts attaching the pittman/draglink to the wheel cyl. had play.

I was able to remove the cotter and tighten the top bolt but the lower just spins.

Before I do something stupid. What is the correct tightness and how to stop that bolt from spinning.

Pic of bolts on Instagram here >>
https://www.instagram.com/p/BErDEbmyFN7/

TIA