There was a guy here in town, where I live, that had 31/10.50/15's on a 54 3/4 ton truck. They were mounted on wagon wheel rims. Seemed to drive fine. Like Longbox stated, You'll need rims that don't have alot of backspace. 4" of backspace is about the limit of getting anything to fit on these old trucks.
I've also worked on a 2wd Apache for a guy that had 31/10.50's. I was surprised how easy it steered and drove. I'm sure it would've been a different story if it were loaded.
