I don't think the plant where the motor is made had anything to do with it. As long as your swapping a 4.6 for a 4.6
If you have a romeo engine they are a 6 bolt crank setup, if you have the windsor then it has an 8 bolt crank. So you would need to change your flywheel and or flexplate depending on your new setup. as far as ecm's are concerned yours it fine and the 00 ecm is not needed.