A body 8 3/4...can I use 9" drums from a 7 1/4 rear??

I'm swapping to a 8 3/4, and am wondering if I have the A-body OEM
8 3/4 small bolt pattern axles...can I use the 9" brakes that came on a
7 1/4 rear.

Is the 8 3/4 axle register and centering hole on the 9" drum compatible??

Backing plate bolt pattern the same...???



Thanks!