I bought a book on divco's out of vintage truck.published by antigue power. It's interesting reading even if you don't have a divco. A model D is said to be the same as a C but listed as 11000 lbs. gvw. They also list ,unconfirmed that the 300d was produced from 1968-1975,and after 75 the records get scarce. My .02$ also restored divecos look cool. :hammering: It hurts to type!!!