How difficult is it to replace both of the OMP lines? What do I need to remove in order to get to it? Also, it smells like gas under my hood and from what I've read it could be either the injector o-rings or the pulsation dampener. I managed to take off the intake manifold but I'm confused on what to do from there. Does anyone have a write up or pictures I can follow that may help me? Thanks.

 

To find where the fuel leaking from,(with the UIM off) you could connect the F/T and the GND in the diagnosis box and start looking around.
I think you might need to take off the rats nest to get to the OMP lines.