I'd stick with the drums if it's a maintenance issue. My '66 Coronet 440 has the stock drums and as long as I drive sensibly down long grades (not like FL has much of that) it's not an issue.

If you are looking for increased brake performance my preference is the 73-76 A-body spindles and the 11.75" rotors from rotorpros.com and you choice of calipers. Personally I'm a fan of the AR000 Wilwood Dynalite adapter kit. Dr. Diff informed me that we might see these kits re-released towards the end of the year. You can use either a small or big bore master cylinder based on your pedal modulation preference.