Fuel delivery issues

So, 360 in my 71 Dart.

Replaced the sending unit, fuel tank and the fuel pump after finally straightening out my electrical ignition issue, wanting to clean up any lingering fuel issues but created a monster. Car will start and run with fuel in the carb but can't get the system to prime. Any tricks to getting it going again?

Was thinking there might be something in the steel line between the pump and the sending unit/tank but it was running right up until I shut it off to swap everything out so I really don't think there's anything there.

Something I'm missing?