I was wondering if anyone here knew how hard it would be to swap my 3.8 to 5.4 out of a navigator. I've switched engines inchevy cars but not on a ford yet.

 

Just depend on how much time & money you have to spend.

 

you would have to start by getting the proper k member for it and youd need to switch the whole wiring harness then youd need suspension to support the motor and the right transmission i dont know if i would personally consider that easy