Neighbor has one its the twin two yours down to the color. He just got back fom Holidays pulling a car carrier and a 57 Chev 4 Dr Hardtop Belair. Pulled it from west / West Virginia. Said it pulled like a trooper. Only downshifted on the mountains once. You will love it.
These 600 Cummins are simply amazing!!! I can't imagine what the new 2007 6.7L diesels are going to be like..I don't get as good gas mileage that I got w/my older Cummins, but the trade off is more than worth it...My boat is pushing 9000lbs on the trailer and the engine is not even breaking a sweat on the freeway..If I were to choose a diesel for a boat it would be these.