You talkin' modern Dodge motors or the old 360's, 318's and slant sixes?
As for the new engines, the 5.7 Hemi's produced Stateside, but probably on Dodge's smaller cars whose platforms are also used by Mitsubishi, I'd say those cars have Mitsubishi-made engines. I won't be suprised if in the next few years Chryslers start being made with Mercedes-produced engines. As far as I know, Mercedes is already using the Hemi in one of THEIR vehicles.