Hey guys. My step mom has a '93 civic EX with D16Z6 motor SOHC 200,000+ miles I think. The problem is it has a lot of water in #2 and some in #4. The plugs were really tough to get out so I didn't even look in #'s 1 & 3. So my thoughts are a bad head gasket (dad added water 2 days ago and there isn't any for me to see in the radiator to look for oil AND the oil is not even on the dipstick to look at). It could be cracked head too but what are the chances of needing BOTH head and gasket VS. just the gasket? What else am I overlooking?

Can you guys help me with a parts list?

Gasket kit
head bolts
spark plugs

Thanks for your help.