Ford Windstar Air filter enclosure should be plenty! Look them up. Then you can rig hoses to and from. That is what I'll be using eventually.I've been looking at the 800 series--maybe the AH19490 or just the straight through(that is just the housing). They are pretty large and pretty damn expensive. But you can certainly do it. Maybe not in the fender, but you can do it and draw air from the fender...
What I would love to know are the real world restriction numbers of snorkels...