Ok

exscuse my ignorance on this, how do you achieve 2.0 on a zetec block then, from a top cross sectional area view they are exactly the same size are they not? Hence why you can fit a CVH head on? SO surely you must be able to bore it out to 86mm as per a Zetec block? If that makes sense?

Or does boring to 86mm on a CVH not achieve 2.0l, meaning the Zetec block must be taller, as in longer stroke bores?