Yesterday I was driving my new '57 150 (LS3 power) from the builder in Rancho Cordova, CA back home (about 125 miles, 1,500 on the car) About 45 miles into the trip my fuel line blew off the fuel rail. It had a press on AN fitting with a plastic clip. I have since been told ONLY use the all metal fitting on high pressure lines. My wife was behind me & could smell the gas, it scared the crap out of me. I also learned that AAA will not tow a nice classic car because they don't want to accept the responsibility so I now have Hagerty towing.