8 3/4 axels???

As long as it's a 5 x 4.5 pattern, the brakes swap from rear to rear, no issue.

8.25, 8.75, 9.25, Dana 60 They all interchange and the drum are specific to the backing plates, so keep them as a unit. Sometimes you have to drill a 5th hole in the backing plate where it mounts to the flange.