im going down the same route by the looks of it
my new idea is why not fit all the things in the first place if i can so
whynot fit bike carbs or throttlebodys to the cvh
if you wanted to be clever you can use megasquirt just to run the ign and ditch edis then you have the option of going fuel inj at any time or even go hole hog and inject the cvh then transfer it all over to the zetec
just rember a cvh is 90hp and some 2.0l new blacktops are running near double that so pick your fueling parts with caution.
a 1.6 or 1.8 would be ideal without having to upsize too much
both would be 36-1 vr trigger so what ever ign setup could be swaped over jolt or squirt
ms1 can be upgraded to ms2 by swaping the chip over if anyone didnt know
(v3 circuit would be a good idea)
its a real shame theres no tuneing bits for the 1.8 cvh!