IMO whether it woudl pass or not is questionable. At Capitol and Masin Dixon probably never be an issue no matter what was used. Question is are you comfortable with this set up? IMO use better materials just for peace of mind. You can make steel line easy enough to go to the converter with many options. B nuts and sleeves to flexible braided line, bend the steel line to fit the cooler, simply use braided line end to end. But what ever you do use a trans cooler that has actually fittings or provisions for them. not one that has hose barbs on it......