Power is in the heads and valve train. 68-70 head's with screw in rocker studs came with big valves and good compression. Get a 68-70 intake manifold and Q-jet carb to match. I like the 75-79 Q-jets best. Most any cam in the 220*-230*/110-114 lobe separation range give you good all around power and still have good street manners.
