Scarebird is far cheaper, plus cheap & easy parts in the future (GM & Toyota). Wilwood is slicker, plus fixed 4-piston calipers, but you are locked to them for replacement rotors, etc. Most resto-mods go Wilwood or even costlier (SSBC, etc). The 1973+ swap requires also changing the rear-end to BBP, or forget about a spare (many new cars do). Post 10 sounds strange since drum brakes, in general, take less pedal effort to skid the tires. The main drawback of drums is they overheat faster (fade) if you constantly brake or are stupid enough to ride the brakes going down the mountain (aka FL drivers on Blue Ridge Pkwy). Drums brakes can also be more uneven, but usually due more to poor maintenance or incorrect assembly.
