Stop in for a cup of coffee

Yes, 1971. Bought in Chicago and spent its life in WI. I dont see a hardline going anywhere under there other than main fuel line. I will go start at the fuller tube and work backwards. Thanks!
Yea. I'm not sure what changes were made when. '67 the vent line runs to the filler tube. Somewhere around '73? the 'vapor saver' systems started to be used.