Grigg - in
this picture you can see my truck with the left outer dual wheel removed. You will notice that the lugs are about at the same level as the outer surface of the axle. That's because there is an adapter(8 lug hub centered to 6 lug stud centered) between the inner dual wheel and the original wheel mounting surface. Crawlerman likely has the identical setup, but with a 5 lug adapter
as seen here . This was a cheaper alternative to turn your single wheel axle to a dual wheel axle - usually seen on 3/4 and 1 ton farm trucks and buses of the day. Referenced
here, in my first thread on the site, Jim Lee talks about adapters. In a later post from him
here he links to his blog about his 1 ton bus with STEMCO adapters. He has great pictures of them
on his blog .