What you could do instead of cutting and flaring the lines. buy the gm 3/8ths in quick disconnect tool for fuel lines. and disconnect the lines at bottom front passenger side of the tank, and at the back of the engine on the drivers side youll find the evap line and fuel line. What i would do from there is find a 3/8ths in male ( 3/8" SAE Quick Disconnect Male Push On) and after you use those connections just route rubber or stainless lines (youll need stainless male quick connects then if you go metal instead of plastic and rubber lines.) rubber lines will clamp right on to those connectors, and just becareful to not route rubber line near the exhaust.
You could also just clamp a fuel hose to the fuel tank connection and then fuel rail connection, and not even have to worry about and quick connects. this is the easiest and most cheap option, although not perfect it will work as high end rubber fuel line will hold that pressure just fine.