You do know that you can keep the original rear end including the emergency brake set up . Remove the torque tube find the pumpkin from a say 62 or so truck, take the old pumpkin out install the " new" one. New crush sleeve, pinion bearing if it needs it. Your best bet is to remove the spring perches and weld the new ones on that have the two holes in them on. The two holes let you center the rear end after the new perches are welded on. Of course new u bolts. Sounds like a lot but not really. If you go with another rear end you are going to have to do the same amount of work plus figuring out the emergency brake. Do a little research on this. You might find this an easy swap. I did it on my 49 and it works good. I have a 3:90 ratio in mine. Oh forgot to mention a new drive shaft. Good luck on which ever way you go.
