I'm not going to bust your balls past this post, but fuel lines next to a spinning driveshaft is not fine. You will never see an OE do that for a reason. For example if your DS breaks (see:
cbrrmike, drag radials & cammed LS1, nothing real special) it will tear the fuel line in half. Or if something gets thrown around by the driveshaft. **** happens. Will your fuel pump shut down when the engine stops (key on) or just keep pumping?