John -

Try calling Scott Foss in San Rafael, California.  I don't know the
number, but think it is in information.  If you can't find it, let
me know.  He does this particular conversion - vanagon diesels
to the turbo charged variet

I've spoken with him on the phone, and he seems quite knowledgeables
about diesel engines as well as this particular operation.

Good luck..

Martha Rubin
nrubin@csuhayward.edu