Easily done without even opening it up.
Escort T3 and manifold
FRS inlet can be had cheap these days and are much better than the shitty HO inlets.
Cheapo cooler off eGay
I can't remember if the injectors need changing though
I spoke to Neil at FastFord about it, he's your man for cheap ZT conversions.

The standard ecu can be mapped, I'd run 8 psi which will quite happily see you with more like 220-230bhp.