Fuel Problems on a 1947 V8 truck

[Irish Tom]

Hi,
Would anyone have any suggestions/ideas of what would be wrong with my 1947 Truck? I have removed the fuel tank and cleaned it out, cleaned the carb, all the petrol lines are clean but when I connect it all back up I am not getting petrol to the carb, tried to start the truck on a pull but still no petrol went to the glass bowl. I poured some petrol into the carb and pulled the truck again and it started great and then when that petrol ran out it stopped.

I am debating on taking the lift pump off but i don't think it is it. Any suggestions would be great.
This is a photo of the truck