you'll need manifold, dump to suit the turbo, if your fuel injected i would think a tune of the ecu/rising rate FPR/oil lines etc/maybe a better fuel pump not sure on the ford fuel pumps/ radiator still not sure about the capabilities of the xf parts/ and a few other things also you will have to get a manifold fabricated with a flange to suit your turbo, carby you could have just a blow through setup but i think with all the money you would be spending just to "whack" it on you would care if it blew up so if you were to do it might aswell do it right
Paul.