2.0 litre zetec it m8 you have the 1.8 cvh running gear it should'nt be that hard to bolt it all up. it should be a bolt in replacement on your 1.8cvh you just need to sort the clutch out which uses a combo of your clutch and 1.8 cvh flywheel *I think* the zetec engine loom\brain is seperate from the main focus\mondeo loom it just needs splicing into your 1.8 cvh loom

check this out for RWD zetec applications.

http://www.spydercars.co.uk/practica..._feb05_pg1.htm