A good NA setup on the Zetec costs too much money for too little results.
Head package = $1500
Trans w/ LSD = $1800
Lightweight flywheel = $300
Intake = $100
Exhaust w/ header = $400
UDP = $50
Larger TB = $200
Intake Manifold = $400
Titanium valve train = $400
Cam gears = $150
Larger MAF = $50
New injectors = $150
Larger fuel pump = $100
Oil cooler = $50
Larger radiator = $100
dyno time (conservative 5 hours at $75 per hour)= $375
chip with custom burn = $300
Total = over $7000
And were looking at 200HP.
Now some of the stuff you could probably pick up used, so well drop $1500 off, so were at $5500 and we never touched the block.
And unless you do the install yourself, labor = $$$$$$$$$
On a side note;
I have a head for sale (make offer) that has been shaved between .030 and .040 to raise compression and the ports have been slightly polished (its not a full PnP).