Do you happen to have any pics of these headers? I'm toying with the idea of doing a navigator 5.4 swap and one of the things that I want to do is install longtubes on the 5.4. I have mac lt's on the car right now with my current dohc 4.6 but don't know if I would be better off building a set of lt's or trying to modify my current ones to work. Thanks!
-Esteban
-Esteban