[rotorwrench]

If your coils are buzzing, can you get sparks on #1 plug when you rotate it through with the hand crank? Will each cylinder build compression? If it has a stuck valve or two, you can pull it all day without it starting. It doesn't have to have a lot of compression but it has to have enough to draw in a mixture. It may build a bit more compression if you squirt some oil in each cylinder. Marvel Mystery Oil or a good penetrant can help free up sticky rings & valves.

You mentioned rebuilding the carburetor but what about the fuel tank? Is it in good clean condition? Cars that set a long time can get pretty fouled up.