7 1/4 To 8 3/4 drum brakes

Hello, if the drums are actually 10" small bolt pattern, they will work on original 83/4 a body. I have had both. Switched the drums around. The brake shoes are the same as well. 10" x 13/4". The backing plates are different. Biggest difference being the bolt pattern. 71/4 has a 4 bolt pattern, and 83/4 has a 5 bolt pattern. Offset is the same.