I was curious as to how many of the new Cummins 600 owners have owned a previous 2nd gen truck, more specifically '00-'02 years and how big of a difference does the performance of the engine compare with one of the mentioned years. I know the hp and torque numbers are larger and I'm sure you can tell the difference, but I would like real world figures. Are you able to go 65 mph over that steep grade now then instead of creeping over it?