I have a problem with a fuel vent valve. The guy that built the car mounted it on top of the gas tank. So now every time I fill the tank gas runs out all over the place. When full or expands. Can I just block the line off and drill a small hole in the gas cap? I can not get to the top of the tank to get at valve. I sure don't want to tear the rear out of the car and a
stuff. My gas cap is a solid screw on type gas cap. The motor is a 350 TPI if you need to know that. Thanks in advance!