Need brakes for 8 3/4 rear end 5x4.5in pattern

I bought aftermarket and I am running green bearings. Not sure what you mean by standard flange offset or A body flange offset, but it measures exactly to A body measurements if that helps. This is my first build and I don't know a whole lot, learning as I go.
This pic explains it pretty well (I stole it from @72bluNblu )
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It should also illustrate why different drums and backing plates are required for stock A bodies as opposed to the standard Chrysler 5x4.5 axles.