They're already out. Hell, I saw 3 or 4 of them ('07 chassis cabs) at the dodge dealer on Oak Ridge, TN when I was visiting. That was Dec 29 and 30th last year. I stopped in and had them raise the hood one one so I could see what the 6.7 looks like.
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'98 12v 2wd quadcab dually with 271k, BHAF, #0 plate shoved all the way forward, afc arm removed from pump, 3k gsk, timing set at 16.5 deg, 4" mandrel bent exhaust, new 3.54's and detroit locker, southbend dual disk clutch, fogger nozzle with #82 jet plumbed into air horn, htb2-64 turbo, has broken spider gears in two dana 80's so far, has run 14.65 at 98 and dynoed at 450 hp 906 ft/lb torque in 4th gear on bottle, 399 hp 814 ft/lb in 5th gear without bottle