bigger rear drums

I had a '75 pickup with a 9-1/4" with 11" brakes that I removed to put in and 8-3/4" that had 10" brakes I just swapped all of the brake stuff. It worked fine. If I remember correctly the 9-1/4" only uses 4 bolts on the axle plates but the 5th bottom bolt like on the 8-3/4" was already in the backing plate it just was not used.