" also there is liquid coming out the exuast pipe that looks and smells like coolent. So I am guessing its the head gasket. right? I guess i should pick up a compression checker."
Yes and yes.
"But if it is only on a single bank of cylenders I guess i could just replace that one and not the other right?"
No, you should plan to do both if it overheated.
"also I just cleaned the intake mmanifolds and replaced the gaskets. do i need to get new ones again?"
Yes, because of the overheating. You don't want to pull it out again because of a vacuum leak.