Its been sayed a million times that until something is out you don't want to believe much but when I was at the PRI show I talked to one of the Mopar engineers that was working on a top end package from mopar that would use the 08 heads, a unique intake that would use factory throttle bodies. {------Talk about a run on sentence.
He said the hp would be about 580-590 which was about 25 less that what the 08s actually make.