No probs, the PATS is fords Passive Anti Theft System, this is a combo of a locked ecu that needs the relevant coded(chipped) ket to unlock it, picked up by a transponder mounted around the ignition barrel.
If using a pats one so long as you use the key, or at least have it close enough to the sensor to be picked up then the whole lot can be used, just a lot easier with pre pats as it is just a case of powering the ecu no coded keys etc to worry about.
tabetha