Presuming the 2ltr in it now is a silvertop, the mount will be a bit different, not sure if you can make something up that will fit the early 2ltr mount. The gearbox mounts completely different to a cvh / zetec fiesta gearbox, its mounted to the innerwing on a st170 rather than on a cradle, will need a fair bit of work. You will also need custom driveshafts, you will need to sort the cable shift fitment, and will have to run aftermarket management as using the st170 stuff will be very tricky, as its quite intergrated into the car.

All that said, it has been done before.