8 3/4 Rear Brake Conversion Parts - 10" Diameter 2.5" Pad

Prob only applies to SBP 7.25 but not sure. I have another SBP 7.25 axle that has 10" drums. I can check it later today. I believe these earlier 7.25" axles also have 5 studs. I had a 1974 BBP 7.25" with 10x2.5" drums. The backing plates bolted right up to the 8.75" tube. If it has 5 studs per side, that would make sense from a parts sharing standpoint. "Why reinvent the wheel right"?