Brake shoes help (8 3/4 BBP)

Okay:
Drums off the 8.75 are 10" inner diameter, as are the 7.25.
Shoes off the 8.75 are 1.75" and the 7.25's are 2.5"

Some FABO reading suggested that the 7.25" backing plates for SBP had only 4 bolts. My 7.25" BBP has 5 bolts.

Seems like I should just pull the axles and change the backing plates, basically using the entire 7.25" setup.
I think that is the ticket. The 10" x 2.5 would be perfect. The reason the mount pads are different is b/c of the different shoe width. I went through this on mine. Had to buy a set of backing plates with for the right shoe width as the originals weren't right for the brand new drums I had. Anyhow if the backing plates from the 7.25 work on the 8.75 use em'!