while it is no secret that the 6.4 (392) is very real...these 7.0L rumors have been going around for quite some time. if they were ever to release this engine in a vehicle, i would have to think that it would be the long-rumored "viper hemi"...or some other ultra high end vehicle.

also, whoever wrote that wiki articles didnt know that the LS7 is already in production, and it makes 505hp? the same as the 6.4? the only reason that the challenger would "need" a bigger engine, is because it weighs 4200lbs!