What carb are you running?

The angle of the dangle must have been such that as said above the needle and seat did not work right or it allowed fuel to run freely into the carb depending on model.

I calculate 225 inches of head required to get to 6 psi which is why I would also say it is in the carb. If parked with the tank up you could siphon the tank into the carb. Like Denny says, with tank down you might still drain a bowl into the manifold.

Kitz