Hi Paul, fuel should not just sit in the delivery line, it should syphon out as the feed from in top of the fuel tank is higher.
Because there is fuel sitting in the delivery line I would check the connecting pipe between the petrol tank outlet and the delivery line.
If air is getting into the line it would explain the lack of a syphon and the pumps inability to pump.
From what you say it sound like you started and moved your car on what fuel was left in the carburettors float bowls.
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