i have a complete head. i lapped the valves and changed the valve stem seals on it. then used it for maybe 10k miles. bottom end it was on is the one with the melted piston. i have a spare piston to replace the melted one. it wasnt knocking, though id still rebuild the bottom end before using it and clean the head up before using it. the head has the cams and all in it and was shimmed properly. ive got std bearings and rings brand new in the boxes if youd be interested in the whole thing. ill pm you a price.