i have a 63 nova wagon, factory gas tank etc.
Today's gas stations have the Nozzel on the gas handle to prevent vapors seaping out . Thus creates a vaccum (seal) so no vapors leaves the gas tank. So when i fill up the tank with the nozzle is covering the gas tank and not allowing any air the gas will backfire meaning it will shoot back right at me. I think when the tank is pressured it will shoot gas back out because the nozzle is covering the gas cap. could the problem be my gas tank is to old and i need to get a new one? any ideas with this problem ? please let me know thanks

sounds like you just need a vent in the tank, & I think yours doesnt have one. I have seen where folks will drill a hole in the sending unit top and soldier a tube on to it to make a vent, then run some more tubing higher then the tank w/a filter in the end to stop cr@p from getting into it....joe