Hi Rinorris:
___If you look up the University of Wisconsin – Future Truck challenge or competition, you should find an automobile named Moolander IIRC? Its propulsion unit was a small diesel based hybrid with SULEV emissions and decent FE for driving such a large GVWR. I remember reading about it maybe 2 + years ago and the team gave very specific details on the exact HW used as well as where it all came from.
___Pass us the link once you find it again just in case I have expanded on details that may or may not have been entirely correct.
___Good Luck and I hope this helped.
___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___
Waynegerdes@earthlink.net