I am having an issue with my Flathead in my truck. It is ok for a while depending upon how hot it is outside for some reason. But the thing is after a while of driving it starts to break up spitting and sputtering. I am a little lost I have checked the fuel filter and it seems to be okay I can see in it and it is not clogged. The other thing is points but won't points be shitty from the get go? or another thing my friend brought to my attention is the fuel tank only has a tiny whole in the gas cap for pressure to be released. He thinks maybe a vent will help out release pressure in case it is built up to much and is forcing to much gas.