I dont think the svt head will work on a zetec engine. I believe the intake cam on the svt head has variable timing and the intake on the svt is a dual stage intake so either way you will need a new ecu and probably alot of other things. Im not sure what they would be but ive never looked into it so i dont know all the details. And i would think you would want to have the vct working so you could have that horsepower. Thats like buying a supercharger but not hooking the drive belt up to it.