Backing plates

Thanks for reply,s.I had bought a 72 Demon 8 3/4 housing with a box of stuff containing B.plates and other misc. parts.When ordering drums and shoes I went the bigger not thinking I,d have to change the plates.Well the Moser axels came in and when I went to fit everything,the drum just sat on the center of axel(shy by almost 1/2 inch)Grrr!Back to the parts store.