like safechav says,zvh pricey and problematic,more work than a woman on pmt, zt, easier way to go if youre gonna outta the two,helps if car is designed to take zetec lump cos then you got more mods if not.cvh tried and tested for many a year with turbo,www.zetecturbo.com www.zetecinside.com got shit loads of info as there may be in tech essay archives on here,if you wanna speak to some1 thats done the conversions then find avinitlarge on here on an evening(avinitlarge is user name)good luck whatever you decide