IIRC you will need 19 and 17mm wrenches to break the line loose on top, and i believe its a 14mm on the inlet, but like it has been said, use a flare style if possible.
Also, break loose the inlet and outlet first, before undoing any mounts, while still using proper support via the wrench on the fuel filter so it doesnt rotate.
Take your time as boogering up the fittings will cost a lot more time in the end than setting it up securely.