Gas Tank Breathers

[chbracke]

Well, I have the same issue that a few other guys have had which is that I've got a new tank in my '70 K5 all hooked up and functioning properly but I don't have the charcoal canister setup at all and when I fill up, I get gas spilling out from underneath the truck. My issue is that the breather lines are way too short (like about 12" each) and so when gas gets going out of one it pretty much has a siphon effect and keeps on pouring. I want to solve this by running longer vent lines but I'm not sure where to run them to (where to mount the other ends) and what breathers to put on the ends of them. Anyone willing to post a few pics of where their gas tank vent lines bolt up to the frame or elsewhere? Any ideas would be much appreciated!