From what I'v read it's not the engineering of the 8 with the hemi, it's the production volume. The hemi's 8 speed will be slightly revised to handle the power, and that is basically causing the Kokomo, IN plant south of me to have to run two lines. Everything I hear still points to either really late 2013, or a 2014 debut of the hemi 8 speed combos in the 300, Challenger, Charger, and RAM.