We just bought a 66 c-code 2nd.owner coupe.Seller has all smog unit on (Ca.) even thu exempt. I parked car after buying and I had gas fumes comming from under air cleaner,no visable signs of leaks.Smell desapates after awhile but not all the way. Stock 2 barrel new 10 k miles ago. I'm a baby boomer so I can handle old car odors but the gas fumes are driving my wife crazy!! Does smog canister (carbon) vent. Car drives fine it only happens when I park.Seller says didn't nottice(lol) Is it carb leaking once turned off into intake , then venting ?? Thanks much been many years since had a car this old (this isn't normal)and will buy manual soon. Thanks-Doug in Temecula Ca.