Oil sending unit, magnum.
Yes. It's deep in there. You need to remove the whole air cleaner assembly and i pulled the plug wires that go to the passenger side of the engine to make it easier.
I see where you said it's a 2004? I didn't realize the magnum engines were still being used. I thought they had gone to the 4.7 and 5.7 by then.
I found this picture on Google. The top part of the sender is broken off in the picture, but I circled it.