I have a question I've always been wondering about. I have a 79' chevy truck, and of course due to emissions it has the vapor line from the fuel tank and the carb bowl vent to a vapor canister. I noticed a lot of hotrods, ect... that have aftermarket gas tanks and carbs don't have this stuff. Do the fuel vapors just go into the atomosphere? Gas tanks with one line(feed), do they have vented gas caps? Basically, how to these vapors escape?
Mark