Thanks for the heads up on what to look for, Dave. I would probly agree with you on the 6.4 for most towing, but I've got a 48 ft gooseneck that usually has 2 cars in it, and I like the stability of the Dually and the Diesel then. I'll keep working on getting the 6.4 from the dealer, I've never towed with one yet. Thanks again, Jim.