C-body 11in Drum to A-body 8 3/4 Questions

Im converting my 71 Dart to 11in rear drum from a 68 Fury III. Not sure what width of drum was used on this car due to the axles and hog had been pulled and drums were gone. My question is... did the C-body use only one size of backing plate or different size depending on the width of drum? also was there a larger then 11in drum used on C-body's?

Thanks for the help.