Converting rear drum brakes from SBP to BBP

cosgig said

Not once did anybody mention, or question just which rearend it is that we're talking about here!! Info please!!!

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Not sure on original poster but my question was for an 8 3/4, I have OE 10" drums with SBP and was wondering if I can use my backing plate and buy 70 challenger 10" drums and shoes to make LBP, if that would work.