Some things in life are confusing, but old trucks are quite simple.
This tech tip is only for 1946 and older 1/2 ton trucks.
If you want a 5 lug rear end; use the entire rear end. This includes the axle housing and torque tube.
If you want a 6 lug rear end; install the torque tube(with differential) in a 48 or older car axle housing. Use the 48 or older car axles.
Both setups require the spring pivot to be relocated. As well as the other modifications Jim stated in his tech tip.
Quite simple.
