I have no clue about the water but you might want to consider some resealing.
For the power wire, it all depends on whether your tour is a mtx or atx. I have found that the atx's have a nice spot where you can feed the wire right through an existing groumet. Now on my SVT i searched that engine bay for hours trying to find a spot to run it. I ended drilling a hole down by the clutch pedal.
If you look at the fire wall on the drivers side from the engine bay you can see a little budge. I ended drilling right through the tip of it.
Hope that helped somewhat
