We will also install our Maxxfan forward.
We figured it's going to work better with our layout...
- To allow good air circulation in the back, we will most likely have to cut a ventilation hole (air-in) on the floor at the rear of the van.
You may have an easy solution to the rear air intake need. Under the van, at the bottom of the D pillar on both sides, there is a 3x4-or-5 inch plastic plug that can be removed. I've been running without the one on the driver side (passenger side is too close to the exhaust) for about a month. Need to devise some rodent screen for it. In a cargo van, there are plenty of holes and openings on the D pillar, for the air to come through.
Beside that, the cabin air exit vents (which we assume have one-way flaps), are hidden under the black side moldings behind the rear wheels. It has been speculated that these could be modified for air intake, but, no one has yet taken a shot at it.