Check out these measurements for my 8 3/4

Yes you can, but you may need new housing ends or have to adapt the newer backing plates to fit. I haven't seen one of those in so long I can't remember. But yeah, if you are going to move the spring perches go ahead and get the offset shackles so you'll have a little more tire room.

Otherwise you'll need
Flanged axles, bearings and retainers.
drums
backing plates
shoes. wheel cylinders, axle seals etc.