The early Dana 44 has bolt on spindles and was used by many companies for their 4wd trucks. The 4wd Jeep Wagoneers in the 80's had a regular truck type hollow spindle that was a bolt on unit. An eight bolt disc/hub/bearing set up will most likely require custom machining of sleeves, spacers, adapters but once you have all the measurements spend time on the Timken "bearings by dimension" site and see what comes up.
