Probably already know that one of EcoModder's own has done a Porsche diesel conversion....
Not a kit car though - real, classic Porsche.
moTthediesel's car:
From:
http://ecomodder.com/forum/showthrea...tml#post173874
Good for ~70 mpg (US) in competition driving (hilly rural route, some city sections, moderate speeds of ~40-45 mph average over the entire course).