10 x 2 1/2 SBP Drum

Not the A-body stuff. Small bolt pattern 7.25 brakes do not interchange with small bolt pattern 8 3/4 as far as I know.

The BBP 7.25, 8.25, and 8 3/4 brakes are interchangeable. The BBP axle flange offset was the same across the board.

I'm interested in the interchange of just the drums between SPB 7 1/4" vs. 8 3/4" for A bodies! Does anybody know if just the drums are the same, or different? I have a pair of flanged drums from a 7 1/4", and they are like new, I have been saving them as spares for my 8 3/4" rears! If they're different, does anybody know just how and where the difference is?

Sorry if this is a thread hijack, I'll moderate myself out of the convo!!