You should just be able to swap bearings and keep the shim pack the same. I am 99% on that.
On another note I am replacing all the bearings in the locked axle I got from Zack and found a shim on one trunion bearing but not the other. It's that normal to have no shim under one?
I guess it depends on the preload. I would think it odd, but not impossible. Mine had one on each side when I rebuilt it a few years ago. Could be a sign somebody inexperienced may have been into the axle previously. How did the knuckle feel when rotated prior to tear-down? Did it seem overly tight or hard to rotate?