The 'torque' of the Nut is dictated by the type of CV Joint used. So, what ever the manual says for Drum Braked Cars, (60 ft/lb) that's the Torque to use.
FYI, from late 1979 of, our local manufactured Big Wheel Mokes, with Disc and Drum Brakes had Timken Roller Bearings fitted at the factory, Front and Rear.