Chris Roop is a Moss distributer in Oregon and gives a discount if you need any parts your local chain autoparts store does not have.
http://www.roopsmg.com/
Since you have a manual, going through the procedures will be easy.
Why does your dad say the pump needs to be cleaned out? This is unusual. More common problems are a clogged or restricted pick-up tube, clogged or restricted fuel filter, clogged or deteriorated fuel lines, pump not getting power, poor or nonexistant ground connection.
Check all the fuel lines to make sure they are in good order. Unplug the power wire going to the coil (I believe it is a white wire, but look at the wiring diagram for your car to be sure) and insulate it so it does not short against anything. Disconnect the fuel line at the carburetor and stick the end of the hose into an appropriate container. Turn the ignition switch to the on position (not the start position, you do not want the motor to turn over) and pump all the old fuel out of the tank. Put some fresh fuel into the tank and pump a little of that out to make sure all the lines have been flushed. Replace the fuel filter. If the pump is not working, you will have to determine why the pump is not working. Is the fuel filter clogged? If yes, then replace it. When the fuel pump is working, it will click. If you have cracked or deteriorated fuel lines, the pump will pump air to the carburetor not fuel. Check the electrical connections to the pump, making sure they are clean and secure. The white wire should have 12v, if it doesn't, use your wiring diagram to trace the circuit to find the fault. The black wire should connect to the body of the car. You can use a test light to check the ground wire. Make sure it's connection terminals are clean and secure. If the electrical connections are good and there are no leaks and the pump is not working, try hitting a couple of times with a screwdriver handle, if this makes it work, the pump will need rebuilding or replacing. Don't let the pump burn up by running it dry for very long.
After servicing the fuel lines, install a new fuel filter, and reconnect the fuel to the carburetor.
Now go over Tony's (theautoist) check list to make sure everything is in order. By spending a weekend looking over the car bumper to bumper, you may avoid unexpected failures.