65 dart 273, No fuel from pump to carb!
When you hit the throttle, are you getting any fuel from the pump nozzle ? If the carb has been sitting for awhile, it can become clogged with old fuel. Simply remove it, and blow it out with compressed air, and a tiny drill bit or wire.
In regards to the fuel pump, you wouldn't be the first person to get a bad "new" pump.