I have a 1956 short school bus. 5/10 7.25 with 5.25 bore. I am on 22.5" aluminum Alcoa wheels with adapters. I have a later model Dana 80 rear axle with the same lug pattern as my 56 axle had, but with disc brakes already. So getting the front disc conversion has been high on my list to get done. Here are some pics of my bus and my adapters. You could also put in a spacer ring to make up the difference of the hub bore too.
