Originally Posted by cdstl
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


Any one other than the A body SBP ones will work. You can also us FMJ and R bodies as donors. I had a set of M body cop 11" drums on my 8 3/4 for awhile. I believe Doc Diff sells a drum brake kit all ready to go and all new. Might save on shipping if you go that route when you get the axles.