Well the ? is the title. I have a guy who wants me to swap his head on his SOHC f22 motor. He bought it from some people who never changed the oil and he said it snaped the cam shaft in half. Dont ask me how when. LOL What should I charge this guy to take the head off and put another one on. This would just be labor no parts. Obviously I know how to do it.. but Ive never charged anyone.