I just looked under the hood... wow it's tight in there. The only way I can see to do something like the filter I put on my SuperDuty (WIX 46637) is to move something... the battery on the right side, or the P/S res, coolant res, and the fuse box on the left side. There just isn't ANY room under the hood for a filter that size.
When I was looking, I didn't take off the 'dog box', but it looks like the tubing that goes from the current orig filter housing goes into something else, then back to the turbo. I'll look closer when I have more time. Anyone know off-hand what it might be in the middle? Seems like it has something that sticks out, going to the pass side of the van... can't tell, needed a flashlight...
Greg