I can only comment on the Hemi, it has many issues. 1. valve seats fall out 2. exhaust manifold bolts break. (very common) 3. Roller lifter rollers fail. 4. Oil pump failure Im sure there are more I am forgetting. I have an 05 but its really low miles (around 60k) so no issues with it so far. A friends 07 had the oil pump go out and locked up the engine. Found most of the exhaust bolts were broke when we swapped the engine out.
