the head could probably take it for a bit, but its not a matter of the head, its the springs that return the valves closed, if its going too fast, the stock springs aren't strong enough to return it back quink enough, and thats called valve float, and when that happens, you risk piston to valve contact, not too good on the piston or the valves

and a set of double valve springs is cheaper then replacing pistions and valves and valvesprings, cam profile has nothing to do with how high you can rev it, it'll affect performance at that RPM, but not that it can go that high, and just search piston to valve contact to see how much it sucks