1970 Road Runner Six Pack Fuel Run Off Issue

[RoadRunner1970]

I am having an issue after filling up the car with gas and parking it in the garage, fuel overflows from gas fill. Is this a venting issue, I am using a non vented gas cap. Wanted to get other peoples thoughts on this issue. thanks

 

[dadsbee]

Fuel expansion, cold fuel out of a ground tank and you park it in a nice warm garage.

Is it actually leaking out the cap or from around the rubber tank to neck seal that generally rot after 50 years..

 

[pnora]

I am having an issue after filling up the car with gas and parking it in the garage, fuel overflows from gas fill. Is this a venting issue, I am using a non vented gas cap. Wanted to get other peoples thoughts on this issue. thanks

You also should make sure that the actual vent tube is intact and not plugged.