Car in question is actually my best friend's 69 Nova. My own vehicle is a 70 Duster with 318 and no evap system. He went off and did something nuts and bought a $16,000 Chebby even though I was trying to talk him into getting a Babyfish or Dart. I know that being a Mopar forum, this isn't the ideal place to be asking dumb Chevy questions, but I figured there's plenty of gurus here, and fuel systems are pretty similar among most cars of that period. I'll have to check if his car even has a vent line to begin with. I was just wondering that if with no vent line or a plugged vent line, it would cause these conditions. I greatly appreciate the technical info, and I'll keep it in for my own vehicle!
