I will add that the greatest majority of the information I can find online about the strip widths on the 58/59 Fleetside (including GMC Paul's) is wrong.
So the fact that they looked up the info they had and asked to verify it while I was on the phone is a point in their favor to me. The fact that the first thing they had listed being incorrect does not terribly bother me, since they are taking the time to validate it.