Brake information

Drum and backing plates need to be from the same size brake. So yes, your 7 1/4 drums and backing plates will fit the 8 3/4 as long as the axle bolt pattern size is the same. For example, I swapped 7 1/4 drums and backing plates (10 1/2) from a 1974 Dart onto my 8 3/4. Both had the large (4 1/2) bolt pattern.