Yes, the lip highlighted in yellow. Thank you for that. I don't have that capability.
Yes, the '03 to '08 have a potential valve seat issue, usually associated with an overheating event.
I wouldn't be surprised if it had been gotten into at some point. I bought the former cop car off a county surplus auction. They will not give you service records. I noticed that the valve covers may have been swapped side for side, because the UPC(?) code sticker is normally(I think) on the left front of engine, and mine was on right rear of engine.