The pipes run along the chassis rail into the engine bay with the fuel IN pipe running straight to the lift pump and on to the injection pump via the filter
I've just replaced all the fuel lines. Just get 8mm ID fuel line and at the lift pump I didn't bother with the unions etc the pipe will slip over the lift pump in and out pipes and just fit jubilee clips then onto the filter and injection pump. For the return buy 3.2mm ID braided pipe and pull off each length in turn then hold against the new pipe and cut off then push on.