Has anyone ever fitted full belly pans under their Vanagon for increased
aerodynamic efficiency?  There's a lot under there that snags airflow and
causes unnecessary drag.  I'm contemplating installing galvanized sheets
under the van and some in front.  With 82hp every bit helps while going 75
mph.

Here are pics of the underside to help visualize:

http://i16.photobucket.com/albums/b7/misterpolak/Hershey/25.jpg
http://i16.photobucket.com/albums/b7/misterpolak/Hershey/26.jpg

Any engineering thoughts?  How would you do it?

Chris S.