Just put a speed demon carb on my 63 polara using their dual line braided connection kit. I have never worked with braided or AN fittings before so please bear with me. The original metal line from the tank is flared with a fitting on it that screwed into another metal fitting with a very stiff section of 3/8 hose on it which then went on a barbed fitting at the carb. The way the new connections work out there is no way for me to flex the rubber line backwards towards the firewall as it kinks, so I cut it and barely got it connected to the barb that came with the demon kit, only for testing. It would not hold on the road for sure. If you look at the pics you can see the metal line from the tank with it's fitting, and in the other photo the rubber hose and fitting that connected to the metal line. The fitting on the rubber hose section is marked - 6 but it definitely is not fitting any of the AN 6 fittings in the demon kit. What I would like to do is adapt the metal line to connect to the carb directly with some sort of adapter, or if it has to flex some then some more flexible braided or rubber hose and adapters? The problem is I have no idea what adapters to get that will fit on both the metal line and either the barbed connector in the demon kit or the AN fittings directly. If anyone can steer me towards the right size connectors and/or adapters to use I would really appreciate it!