I took my valve cover off yesterday to replace my valve cover gasket and fix what I thought was a valve cover leak. The gasket looked fairly new and didn't seem to be leaking, and after further inspection I found a hairline crack on the side of the head on the exhaust side of cylinder 2. Oil has been leaking from this crack since at least February or March and I have daily driven the cruiser for at least half of the that time. I plan on replacing the head with a used one I can get from a guy local to me. What else should I replace while I've got the head off, and what should I look out for? The engine has 234k on it. Thanks in advance for the advice.