PLEASE HELP! wheel/ rearend ?????

[67 chevy heaven]

Hey All,
I am finding out that I am really really stupid when it comes to these truck rebuilds.
I have a few questions...
1st ?... I dissambled the whole rearend. I wanted to get it cleaned and powder coated. Cool idea I thought..
Well I cant find the bolts to reassemble the whole thing.
Can anyone tell me what the correct size bolts are needed to bolt together the..
the rear drum backing plate that attaches to the rearend housing.
also do they have to be hardened? (grade 8)
what about the wheel cylenders? what size bolts and should they be hardened (grade 8)
Any other pics or info would really be appreciated.
I feel so dumb right now.
You learn from your mistakes I guess. I just wish I did not spend so much time learning.