you need lots of parts from a 1.8 zetec fiesta. all you can use from the mondeo is the engine, loom and ecu.

you will need, fuel tank and pump and lines, exhaust, all water pipes / air pipes, radiator, oil pick up pipe, oil pump, sump, probably suspension, gearbox, engine mounts, inlet. the list is endless

mayaswell buy a zetec fiesta aswell