factory parts for installing the Hemi...

yes it will work with the alterkation. That is what 5.7dart used in his barracuda build. You can pick up a new one from the dealer for about $50

The only problem with the truck pan is that it hangs down pretty low. I did not want it past the k-frame. Most guys it is not an issue, but my car is pretty low in the front (5" ground clearance) to the k.