This is a very good discussion we have here. If someone would have a picture from the 70's of an original T/A or AAR with a vent tube center carb with a 1 nipple breather I would be a believer. As of now all I have is my 1970's car magazines with pictures showing otherwise. I find it hard to believe the factory would just let gas vent out on a hot intake. I guess we are not going to convince each other one way or another.