Gas smell from my 6 banger

My 66 Dart 225 /6 is the same way. No leaks at all and rebuilt carb adjusted to the correct settings. Usually the smell is stronger in the warmer weather when I shut it off after it has been running for a while. My old 65 Dart GT 225 /6 also had the gas smell and no leaks to be found. On both cars the only place I could trace it to was the air filter area, and there was no problems with the heat riser, choke, or flooding down the carb on either car.

Paul