Cylinder head question

Looks like you guys knocked it out quick. I put a valve from #2 in and it sealed perfect, barely had my thumb on it.

I have to order at least two valves, does the cylinder head and piston normally survive something like this? The valves in #4 seem to be going in tight like the other cylinders. The car was running well when I bought it (assuming you think running on 3/4 cylinders is running well). So, fingers crossed all I need is two new valves.