I'm starting to think it is the alcohol in the field that cause the issue.
2 tanks ago I went alcohol free and the other day after my dart sat for a week it started with 2 pumps and 2 cranking cycles.
BUT even with the alcohol fuels after a week I still had fuel in the bowels after a week. Pulled air filter and pumped the gas 4 times and got great squerts each time. (I do not have a separator between the carb and manifold either.)
I think we are all just too spoiled with our daily driver EFI cars.
On a side note, with the engine cold and having sat for a week, you could disconnect the fuel line into the carb, run it to a hose to SAFELY fill a gas can, crank the engine and see how much fuel you get in say 2 or 3 seconds of cranking. It might surprise you.