http://www.ifsja.org/index.shtml Yes there are some narrow and wide track in the late 70,s Jeep trucks and wranglers wont,t work. Wagoneers not cherokee. Most late 70,s were also full time 4 wheel drive,quadratrack, but it is real easy to change to manual hubs. I may even have another front dana 44 in my barn, but shipping to Mo. would kill you. We seem to have lots of them in western Pa. I made a plywood template of the narrow track with spring mounts marked and would crawl under wags all over western pa. Much easier than a measuring take. Also the pumpkin on wags can be on either the drivers side or passanger side. Need to match the rear. Not many 3.73 rears out there, so I need to swap gears in the one I now have. I don,t think I will try it though,$250 to get gears swapped around here,with your own parts. Paid $50 for a dana front and rear, about another $100 in ball joints wheel bearings and used rotors. Gets expensive real fast. Hopethis helped.
