I figured that since he is selling it for $850, it can't be a real FIA head which would probably worth several thousand $.
I've searched for more info on the FIA heads and only found the post with HS30-H's pics of the FIA L6 Safari head. Seems there is not a lot of info available on these FIA heads.
By the way, thanks for your response Tony D. I have been lurking on the site for a while and always find your posts, along with posts from others, very informative.