Closest I could come up with was the spes given in the '54 manual, which says 50-60 for 1/2 through 1 ton. That seems a bit low to me, especially with the '55 manual showing 65-90 for 3/4 and 1 ton. Given a 1/2" stud, 75-105 would ba a good range.
I would suggest rechecking them after you put about 25 miles or so on them. Usually, steel wheels aren't an issue with this, but it's better to check that have one come loose.
