You want a 2.0 black top with a 1.8 sump and water pump and a Renault 5 oil filter.
You need a ib5 gearbox from a mk4 or 5 fiesta diesel. This puts the starter in the correct position. And yes you will need a 1.8 Zetec clutch.
You can use racing puma shaft, hubs shocks and wishbones for wide track with low offset wheels. This will give you plus 2ish inch each side. This is plenty. Any more and it won't drive properly.
And if you run a Zetec s loom you can jiggle 2 wires about and plug a 58pin focus ecu straight and it will run of the original loom ( I looked loads Into this. )