I've got one and the 6 speed box, it's turbocharged though and the car is a Mk3.5 Fiesta. You can fit the engine into anything, it's no more a difficult task than installing a standard Series 3 Zetec.

I would recommend an aluminium flywheel and aftermarket clutch.

More pics on my site in the Mk3/3.5 Fiesta sections http://www.mwstewart.co.uk/