Looking at Rockauto I see that Enginetech sells one new head and one remanufactured head from 2000 - 2007, something like that. There's one part number for right and one part number for left.

Allpar says that EGR and knock sensor were added between your two model years.

It's ironic that as much as you dislike the 4.7,, that one should have fallen into your lap!

R.