4.2 V-8 has misfire on cyl 8 likely due to overheating. Is this a dropped valve?

What is your question?

Compression reads 65 psi. Car has 110k miles. Fuel and spark are present. Car has rough idle due to misfire of and also makes a steady ticking noise near cylinder 8 which sounds like a valve noise. Does head need to be pulled? If so can it be done with engine in car? Oil and coolant are not mixed and car does not overheat.