Cam phasers are 3 valve motors if I remember correctly.If you go with a 5.4 do make sure it has been remanufactured properly. Unfortunately the 5.4 although it is a good engine, does have issues with cam phasers. I do think Ford Resolved the spark plug ejection issue.
To the PO. Just send it and get a chevy. I feel your pain with the ford modular motors, I have owned several and I feel like every one if them was junk.