Spent the weekend replacing the pads/shoes on both my cars.... one is modern (rear disk brakes, ABS on an independant suspension) while the other is old school (drums on solid rear axle). I bought the 8 1/4 loose knowing it came out of an A body but had no clue what year ('73 to '76). I resused the parking brake levers from the 8 1/4 but bought new shoes/internals as though I was replacing the brakes on my '75 Scamp (has a 7 1/4 but is large bolt pattern and there should be no difference, right?). So I was set to put the drum brakes together when I noticed that the brakes are different on a '76 rear end compared to '73 to '75. Different part numbers are listed for the shoes, brake levers, wheel kit, ect. So in a round about way, I now know that the 8 1/4 I picked up came out of the last year of the A bodies.
And here's modern technology:
And here's modern technology: