Carb problem

[ABento]

Working on a 59AB its in a 34 1 1/2 truck, gas tank is under the seat.
If it sits for a few days it won't start,its not getting gas, the carb is empty, I have the fuel line looped above the fuel pimp but that didn't help, if I pour a little gas in the carb it fires up and runs and will start and run great if it runs every day, can the fuel pump be weak to where it doesn't pull the gas up from the tank after it has dryed up but will work once it runs.