Replace fuel line on 1972 vw superbeetle?

the fuel line from the tank to the engine bay runs from the bottom of the fuel tank, down the inside of the tunnel that houses the shifting mechanism, and exits out the top of the transmission mount. as far as replacing it is concerned...the fuel line from the front of the body until the exit at the transmission mount is metal, and shouldn't need to be replaced; but if you do find it necessary to replace it you're looking at a lot of cutting and welding.

Good luck!!