318 questions...

well I pulled the heads apart...now I am kinda bummed. the exhaust valves are not looking to good. there is quite a bit of material missing around the bottom of where it rides on the guide. kind of like the metal was chipped away. I guess that is what they call burnt. so now hear is a question for y'all...can I just go buy some exhaust valves and throw them in or am I going to have to get them completely redone?