Here is what came out of my 1960 Wagon's Fuel tank today!
After repetitive problems trying to get fuel from the main tank to the fuel pump, I took the tank off again and removed the fuel gage sending unit so I could get a better look! Well I was surprised to find this inside the tank filter on the end of the fuel pickup tube. Took a little bit, but I was able to rake it off using a piece of old brake line. Looks like some kind of metal screen filter, and all stopped up. Also ran a piece of stiff wire and some berryman's thru the tube a few times and now have good airflow. Will have to get a new gasket before re-installing the sending unit.