66 Barracuda rear disk setup

To the original poster:
What is your primary reason for wanting to have rear disc brakes? I'm not saying you shouldn't do it but it may be difficult to keep the SBP and 14" wheels.

I'm convinced one of the main reasons Chrysler finally went to rear discs is because they are easier to adapt to ABS. Most 8-3/4 rear kits use green bearings eliminating the good Timken tapered rollers and the fine pre-load adjustment feature.

I have rear drums on my A bodies and they are fine, never a problem. Of course they are in excellent shape with good shoes, drums, new hardware and self adjusting.

Unless you are road racing, making consecutive panic stops or commuting down mountains, rear drums are more than adequate with front discs because the fronts do 2/3 (pick a number) of the braking anyway so you should be good. Of course if you are doing it to show off that you have rear discs, then you are on your own and not much will show behind 14" wheels anyway.

I will say that rear discs are probably lighter overall with less rotating mass though.