Even the standard cummings for 2003 will be 250 HP 2900 RPM and 460 ft-lbs 1700 rpm with the automatic, and it too gets the new high pressure common rail injection. Ford's manual transmission diesels do have more HP then the autos, but the Chevy with the Allison is the same. It is yet to be seen if the new HO cummings will not be available with the automatic because there are some possibilities of using a mercedes truck automatic (possibly the reason they didn't go with the Allision.)
Dusty was right, even if Chrysler never owned any part of Allison, they did turn down the opportunity to use the Allison in the new ram. The contract to do it was signed by both parties but something went sour. Allison had even boosted production capasity and has since released a memo on their commitment to service other OEM then GM. The Allison is supposed to still show up in the Chassis Cab 3500, 4500, and 5500 series trucks though.