Technical advances in diesel engines and drivelines.

Ivylog, you indeed did interpret my question correctly. And thanks to all for the advice. Although a seasoned mechanic, I've had no dealings with diesels. Most of your posts confirmed what I had suspected. With the longevity of diesels being what they are, I had hoped that buying a pre 2005 would not penalize us with less than optimum fuel mileage or power. Mr. Mark mentioned early 2000 Cummins wrist pin issues. Thanks for that. This is the kind of info I need before we give up our old 460 Ford class C.