I'm pretty new to the mark viii world and I'm really thankful for the help I've received from you all so far. I have a 95 mark viii engine and trans in my 67 f100 truck. The engines previous maintenance is unknown to me but I've tried taking care of it since I've owned it. My question is.. Are the valves adjustable? I have zero noise but after revs I hear a valve tap on the passengers side for about 3 or so seconds. It goes away though. I don't know if it's oil starved or a loose valve or?? If it's something I can adjust easily then I'd tackle it. Any help is really appreciated!