Otmar was working on this in his stretch Vanagon.
Not sure if he ever completed it.
http://www.evcl.com/vw/

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jeff
Sent: Sunday, September 20, 2009 6:36 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Hydrogen cars. Was: Re: waterboxer pinging

Perhaps someday I'll build my own hydrid: Gas powered 2WD drive train in the
back; Syncro diff with electric motor in the front.  Battery trays under the
pickup bed in the middle.  A hybrid Tristar...

Cheers,

Jeff