Left Lane News has posted a picture said to be a (pre-production) 6.4L Hemi (aka "392 Hemi") in a Jeep Grand Cherokee SRT8...
Here is the link:
http://www.leftlanenews.com/jeep-gra...okee-srt8.html
Since it is pre-production, it has not been been "purdied up" for production yet... comparison pic to current 6.1L Hemi: