My son and I will probably convert his 70 Duster to discs this winter. He has the factory 8.75 rear end and this is going to involve purchasing some big bolt pattern axles from Dr. Diff.

I haven't looked into everything completely, but I understand that the A body 10" rear drums have a 1.75" brake shoe and the big bolt pattern axles will need 2.5" shoes. This will require different backing plates.

The question is this. Which brake backing plates can I use for the bigger shoes? B,C or E body 10" drums and backing plates? Any of those or all of those.

Thanks