The new Hemi is not a true hemi but kind of a combination of a trick flow design and a BBC head. A true hemi has the valve stems 90 degrees to each other and a direct line from intake to exhaust port. The new hemi is more of a splayed valve. Since Dodge is the truck line almost all of their heavy trucks rely on the Cummins 6.7. Now that would make a nice RV chassis but no one wants a FRED. FREDs are inherently noisy.
Randy