641Workmaster,
You DO have the situation well in hand. If you installed the new fuel pump and it did fill the cup at the carburetor, it shows the install was proper and the fuel line is clear.
You indicate you are not using the fuel tank in the truck, but a temporary setup. So this means there is no doubt that these things are 'crap free' and your pump should work.
If the line to the carburetor were to be plugged at the carburetor, or the float stuck shut, I am not sure the pump would pass fuel up the line to fill the filter bowl.
If you crack the line at the carburetor, I would bet fuel would flow...watch out for fires!
I think the pump is fine. If the suction side of the pump is leak free, the pump is new and installed properly (sometimes tough to do) then it will pump..unless it is blocked at, or in the carburetor.
I sort of feel the same as you do. It seems like the old girl should as least let out a snort or pop to show she is trying.
Stuart
