my truck is a 1959 f350 flatbed it has the 6 lug rear with removable carrier and square axle tubes, the only numbers i can find on it are cast into the carrier and are 1st line: 5200 m 533 2nd line: 6-58 i am looking to find a set of 8 lug hubs for this axle if possible, also a different ratio gear set. any help would be greatly appreaciated.