8 3/4 backing plates onto a small bolt with upgraded big bolt shafts

Here is a complete parts list you need from Rock Auto.
Here is a parts list from Rock Auto
Raybestos brake shoes 334PK
" Hardware kit H7134
" Self adjuster kits H2534 & H 2535
" Wheel cylinders WC37053 x 2
" Brake Drums 2955R x 2