Originally posted by y-knot
Just get them all. You must feel pretty lucky, you waited just long enough to get the latest and newest engine!!!!! Don't want to sound cold harted, but everyone else that bought a new Cummins in the last 6 months got screewed! And big time, I mean they broke it off in them baby... . Can you say depreciation?? and loss of value. If I was you I could care less what came on the truck, I just be happy it came with the 600. Good luck with the new truck,lucky.
I have to disagree with you for the following reasons!
One thing that everyone is forgetting, this new 50 State EPA engine will probably have Federal Regulations that the consumer will have to adhear to. In others words, your exhaust system and fueling probably can not be legally modified, and may be subject to Federal fines if they are modified.
I know the last time I went to a muffler shop to have a new exhaust put on a van, I wanted to put duals on it. Nobody would do it claiming that Federal Regulations required them to only build it to stock specifications.
For the above reasons, I wanted, ordered and will receive (hopefully next week) a pre-04. 5 without the EPA approval!
I think that anyone that took delivery before the "New 600" engine should be happy! For a difference of 20 HP and 45 ft/lbs of torque, I'll buy a box or injectors and not have to worry about the Feds!
And just think, If you have to go though a EPA emission check, you will have a different set of standards to meet! Fortunately, there are no emission check where I live! Can you say BOMBS away with not worry of the Feds!
And on top of that, who knows, the pre 04. 5's might be able to be reflashed to the 04. 5 standards.

No one knows yet.
JMO