Leave the drums out back. They provide more than enough stopping power for the rear wheels, which is usually only 20-30% of the braking for the car anyway. 11x2.5" or 11x3" will be more than sufficient. I run 11x2.5" rear drums on my Challenger with 11.75" front disks, it stops pretty darn well even with the stock single piston calipers. If anything, upgrade the front calipers to Wilwood Dynalites using AR's kit for the 11.75" rotors and upgrade the stock master cylinder. Money way better spent.
Or spend a ton of money on rear disks, install inferior axle bearings, and when you're all done, install an adjustable proportioning valve to reduce the braking power of those awesome rear disks so you don't swap ends under braking. Makes sense right? :dontknow:
How the heck are drums that hard to deal with? A pair of pliers and a long flat head screw driver takes care of just about everything. I mean sure, every now and then a brake spring goes flying across the garage, but if you're ever rebuilt a caliper you know the same can be said about a stuck caliper piston.