Thank you. I checked out the engines for the w123 and couldn't find any for sale currently - the car evidently has a rather large fan base. I also ran across the website "biodiesel.info.cc". Then found a Datsun truck on ebay with 2 isuzu diesel engines for $450. Shame I dont live near Oregon <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> . Then there's the issue of procuring or producing fuel... but it all gives me a good place to start. I think I'll have a lot of reading to do before I make any purchases. Thanks again.