After Market 4.5 inch A-body 8.75 Rear Drums?

Just wanted to double check people's experience once again with 4.5" brake drums. I am not sure the combination I want to run is covered in the thread.

I have SBP 8 3/4 axles drilled to the 4.5 bolt pattern. I also have a set of E Body 2.5" backing plates for 10" drums. Can I use this combination with a 10" E Body drum for 2.5" brake pads or will there be interference issues with this drum / backing plate combo using the SBP drilled axles? If there is minor interference can it be machined out of the lip of the drum or backing plate?

Thanks