You need the 1800/1600 sump, oil pick up pipe, flywheel and starter motor
You need to cut the engine loom out the mondeo
You need to modify the Engine mount slightly to fit in the zetec block
You will need to have the fuel tank modified to take the fuel pump either that or buy it complete form fiesta frezny Think its 100 quid
Exhaust will need a bit of modification and bigger bore
can think of muc more else than that!