Could be wrong but I dont think thats a 67 as I believe the 66-70 D44's had king pins not ball joints. Thats probably a 71 up axle. If your going to do a full width swap need a rear axle as well. then I guess it might be worth messing with if you can get it for cheap and yes the ch#vy disc brake conversion will work in it. all said and done you could probably find a later model full width disc brake D44 easily no converting needed.