The CVH is only worth bothering with if the one you have is in good order and your not bothered about tuning it up! (this thread was about tuning options of the CVH was it not?)
The car will still be fun to drive with the CVH
But in my experience it isn't long before you'll want something more and the CVH aint worth spending ANY money on - I wouldn't even give it an oil change!!!
If it were me I'd find a pre-95 Zetec and build the car with that from the get go as the zetec would be worth it.
Note: The CVH flywheel does not fit straight onto a Zetec as the flywheel bolt sizes are different and there's no trigger ring machined in the back of the CVH flywheel.
HTH BV.