I was wondering what this would take. Some do the other way, but I am putting a 6 on 5.5 D44 in the rear. I got to thinking if I could use the outters of my Waggy D44. I would have the bigger breaks, hubs, and 6 on 5.5 to match the rear. Would I have to get new ball joints. The D30 will eventually be swapped, but no time real soon. This would just solve a couple of problems, and have some advantages.