Humphrey can ask his own question in a new one, there's lots of info on the 2.3 heads in there & using them on a 2.0 as well but I'm not sure of his questions.
"skim cut" for a flat surface doesn't affect C/R much, CAN be cut a bit more if desired.
What he meant by 'changing internals" of the head I'm lost on. Valves/cams/porting?
Don't want to add this to a thread that doesn't apply.
A little research in BOTH Duratec sections might be good, again it depends on his goals with the head.
So I am going to hunt down a D23 head and start on it while I look for the rest of my engine.
Ive chosen to go with what seems to be the favourite of FF which I believe is a D25 block w/D23 head.
Skim cut or decking the head has been suggested as they warp which ive been told changes the c/r (which idk what that is yet) and could even have it cut more if so desired. What are the pros/cons? Explain or link to thread would be fine.
As for internals. I am talking cams and valves but don't know what porting is yet. Read something about buckets and adjustable cam gears or something idk.
Will be reading. Links are helpful.