I'm pretty sure that the OEM 66/67 gas cap isn't vented. The filler tube contains the vent for these two years.

 

Hmmmmm... I guess I'll have to try to see a few pics of one to see how it works then. But, that's good news if you are right. Could anyone post a pic of the tube vent piece for me??? Please,please, please??????

Thanks for the help

 

Here's a pic of the entire filler tube with the vent.

Here it is mounted in the car. That little rubber hose you see on top of it is the vent tube running to the hole in the frame that the factory put in.

 

Thank you VERY much. That answers the question for me. I appreciate your help!!!!

Barry

 

Thank you VERY much. That answers the question for me. I appreciate your help!!!!

Happy to help.

Best o luck on the build.

 

...Although I've seen cars with them shaved, I haven't seen where they run the new filler tube to. I was assuming they ran it into the trunk, but wasn't sure if they had to be vented, because the smell would end up in the trunk, right?...

On our pro-street '67, the filler is run under the trunk floor and out behind the license plate, as done on the Chevelles and some other models.

 

I guess with the non-vented cap, the gas wouldn't leak out on acceleration. But how do you get it to not rush out of the vent? Doesn't the vent just go to atmosphere? Is there like some kind of one-way valve or something in the line?

Thanks!!

 

You mean that's not the fuel pickup tube? No wonder my car won't start...

 

The car has been in pieces for so long I can't tell you exactly how the tubing is set-up, but you'd want to do it the same way as the Chevelles and similar cars. Those cars don't have an issue with the gas rushing out of the filler upon acceleration.

 

The vent in the filler neck is up way high, near the gas cap. I don't think you could get the gas up that far to leak out.