gas spilling-different than others

As mentioned, check that your vent is open. In my 65 Dart, similar to 67Dart273's, there is a small stub tube in the side of the filler tube that a thin tube (~1/16"D) attaches to via a rubber hose. It snakes up high, then back down thru the black rubber floor gasket of the filler tube (instead of frame rail). The tube's exit is often plugged from undercoating or road debris. Try blowing thru it from the top.