Strange Pilot/ hub size on 8.75 Rear drum brakes

Your probably going to have to find some std a body 10" brake set up for an 8 3/4 and redrill the drums out to 4.5 BP. That smaller register is only found on the small bolt stuff. If you use the a body drums your going to have to use the backing plate assy's to match the smaller brakes of the small bolt pattern drums. A bit of a PITA but workable or see if they will send you what axles you need.