I would not expect that anyone who sells wheel bearings for our trucks to have many people there who can come up with specific measurements for what they sell. SInce they do not manufacture anything which they sell, they rely on the company who does make them to make the correct parts.
I just buy them and hope for the best. It almost always works out well.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission