I have a 77 Nova and as much as I like the car in most areas, I hate the rear wheel cylinders.They are held in with a clip and they tend to loosen up like the 78-82 chevelles.I used a rear end out of a 76 olds Cutlass ,it has the same width between backing plates.And it has conventenal wheel cylinders that are BOLTED in, I prefer them.
Lothar