Have a couple of questions for you guys with more knowledge about this stuff than me. I have a 97 F150 with a 4.6. I have a 5.4 out of an 02 F150. How much trouble would it be to put the 5.4 into the 97? I have the engine wiring harness for the 5.4. Will I need to replace the computer? What all else would need to be replaced?

 

Idk how much trouble it would be, but the '97 4.6 plays with DIS ignition while the '02 5.4 uses COP ignition.