Good point Joe, I assumed it was an '03 Durango cause the bill of sale said it was. Better run the number I guess. Makes me question the milage now too, but the engine is spotless although doesn't appear to have been pressure washed.
If it was sold in October through December it could be an 04, according to Wikipedia a 5.7 was available in 04, but MDS was only available from 2006 and later.