My 67 Valiant didn't have the filler vent tube hooked up to anything. The trunk smelled of gas so i stuck a hose on the line and plugged it. That helped the smell, but where is the vent supppsed to go??
I just took my tank out to replace so I just looked at it, but didn't have to deal with any of that so not sure where it comes out exactly, but if I recall almost right next to the filler tube.