Unfortunately I am in the military and stationed in fl so I can't do it in maryland. My partner on the land uses it to maintain the property he can change oil etc but is concerned about swapping the head, I would personally do it if I was there. I think he is capable of doing it my questions are, does he need to pull injectors and swap them? If so is there a special tool for injector pulling? And does he need to set the valves, if so what are the procedures, how does he verify tdc if that's when they need to be set beside verifying valves are closed?