Fuel Tank Issues! Help!

When you described your problem, it sounds like gas tanks has debris clogging the filter causing running out of fuel if so remove and clean or replace as needed, or sending unit is not at bottom of the tank. Assuming you have the stock gas tank in car, you will need to remove the sending unit and when you are inserting it back into the tank before you contact the flange lower the assembly down and see when the tube contacts the tank and adjust the tube as needed you also should get another sock to go on the pickup tube. You also need another filter before the carb, I could not see one in your picture. Nice looking engine.