It will be lower than the tank in the rear hatch area. I am planing the same for my setup ie use the tank in the back. I am not sure if the small line going up front will have enough flow but I am pretty sure it will. I am mounting the pump under the nose panel as well as the electronics. I am using a relay and saftey module output to cut power to my boost controller if it runs out of water. That way if it runs out of water I will only be pushing about 7psi of boost.