Just to add to your info, Yes there was a 6 on 5.5" pattern in the 74 and up Wagoneers. Prior to that the Waggys had 5X5.5". Had one in the family when I was a teenager. Mom busted the cam in the Hurricane six and off it went. All the CJs, FCs, very early wagons, postal jeeps and Jeepsters had the 5X5.5" pattern. Had a few of those too. Also Ford used that in the Broncos and 1/2 ton pickups but with a smaller center hole