14cc head

Bought a nice new head for 6.5 clone off fleabay that's a 14cc. You can tell it's 14cc by the way the chamber looks. Cause it's 14cc head would you mill the head some or just leave it alone and run it just like it is. By milling it wouldn't you go down more on the cc's ? Don't know how far to mill , if any . Any thoughts ?
I wouldn't mill it. I'd spend money getting it to flow better. Bigger valves and port work. 14cc is probably plenty small enough for you. What is this going on?