I blew out both front axle shafts at the u-joints on my '78 3/4 ton - sheared the ears right off the trunnions. Learned big lessons that one should keep the u-joints greased "really" well when running a welded diff, AND not to let friends drive my truck in heavy packed snow. Its got a GM 10 bolt axle with manual hubs. Will shafts from 1/2 ton 10 bolt axles fit?