Hiya mate
currently in the middle of doing an st170 swap to my 95 hatch what i have found is that you will need a power steering delete kit from da performance and alternator from them you can keep your vvti if you are running standard intake manifold but for throttle bodies it will have to be deleted. I am running mine with a 1.8 zetec engine mount to and adapter plate from da performance. Gear boxes are also up to your desire i am running a five speed focus rs gear box with a zetec clutch and flywheel and a hydraulic clutch kit, the only painful thing is having to make a custom gear box mount and shafts can be a abit of a pain as well
if you need anymore info give me a shout on instagram @mk5.barnard