It's a lot easier to put a rubber hose on the pump inlet and put the other end in a gasoline can. Put the can on the fender or a nearby table.
I actually drove with a fuel can on the floorboard and a hose going out the window and under the hood to the pump.
I initially did exactly this. The truck was idling and running fine. However, when I started experiencing issues with it not starting on it's own, plus no longer running, I was trying to narrow down a list of things of what it could be. Even with the gas can method it wouldn't run, so I thought maybe it couldn't "pull" fuel up and out of the gas tank via a fuel line. So now I have about 4 feet of fuel line full of fuel, plus a funnel on top. It shows full so I was hoping that meant I have free flowing fuel into the pump?