8 3/4 A Body Just picked up

If your not going to replace the Sure Grip, and the ring an pinion look good, I say run it.
No reason to put bearings in it unless your going to rebuild the whole unit.

Put the money towards the axels you need.

My vote is for factory (Timken) replacement bearings on the axels. No comparison in strength, and the adjustment is a piece of cake.