"Sleeving" A- body brake drums?

65Val said
...and I think these drums also fit 7.25 small bolt rears as well.

I'm not sure of that one, because the backing plates have to be different, and don't recall the amount, but the axle flange to housing flange are not the same distance between
7.25 & 8.75...10" was optional w/a 7.25?