Oh and one other thing. You could add some openings and rubber flaps to the shroud like my Titan has. When the fan is running it sucks closed but opens up to allow free flow when the truck is moving fast enough the fan is no longer needed.

Don't get me wrong though, I think if your setup works for the way you drive and use your van that is great. Just wanted to share with you guys a setup that works well even when the van is being used to tow.