Chrysler never had to up the 6.4L to compete with the 5.0.........It always had more power and still does.......5.0=425 and 6.4=485.......The disadvantage was Price and that will always play a big part between the Mustang and Camaro........they would have to up the trans and driveline too....
Dodge doesnt seem to change HP and up things...i think its going to be 707hp for 3 years no matter wha
when the 5.0 came out Dodge didnt up their 392 HP to get ahead....they were happy staying where they were and tying the 5.0 on the drag strip
Ford changes HP every year or every other year on the GT500's.....they are the only company i see who is willing to do it.
It took Dodge 4+ years to get the HC going....they are slow to move, slow to change....i dont see Dodge responding to anyone on a year to year basis