I do not know anything about that engine either but I would not change a head unless I was having a cooling problem. Are you having a problem with the temperatures or do you just want eye candy?

I am an OS man and if the engine you have is not up to par I would recommend instead of getting a head I would get a whole OS .18 or .12 CV-R series engine. Or if you want all out power for twice the price get a OS TZ.
My TZ is on the way.