I would also suggest fitting a correct new line, the fuel pump has quite a bit of pressure behind it, so any patching into the fuel line would need a solid insert into the pipes so the jubilee clips can bite down for a proper seal. This insert would cause a restriction in the flow due to reduced diameter of fuel delivery pipe. It may work, but the last thing I would want is for the fuel line to blow off while I am driving the car!
Sundance