1967 1200B PU. Dana 60 When I removed the axles to replace refurbish brake system, there were no gasket between axle end and hub. Studs with fine thread & rusted stuck lock nut on outer end, and course thread in hub held axle in place. When removed, nut and stud came threaded out as one. One side had been weeping oil. Differential was low on oil when checked, I drained it, removed cover for a look-see, all looks good, and will refill once axles are reinstalled. Is there a premade gasket (6 holes) available at parts store for this axle? Part number? Can grade 8 bolts be subtitled in place of stud and nut arrangement to attach axle to hub?