I have fitted bike carbs and megajolt to my cvh and as already said the trigger wheel and vr sensor are already in the correct position which makes it a very simple instalation
Havnt driven it yet so dont know if its made much difference, but i supspect it should once set up compared to the standard pierburg carb set up
If you are planning zetec with bike carbs after iva then you should think about fitting bike carbs, megajolt and fuel pump now so come engine swap time you have what you want/need already, and experience of how it works. Also you wont have to add any extra wires in to the loom to get it going.
If going down this route and are using the donor loom you can strip out all the wires that run the standard ignition system before its put into the car and wont have to do it later or have uneeded wiring allover the engine bay from the standard set up.