Head gasket/seal problem?

[kiosko]

Guys I got a cylinder #1 misfire and when inspecting the coils and spark plugs, I have found a pretty nasty oil leak on the heads around cylinder #1. When i took the coil out of cylinder 1 and 2, both had oil puddled in the bottom of the spark plug chamber. The top of cylinder one was pretty dark and visible deposits. Does this mean it has been burning oil for a while? The amount of old oil around that area of the head leads me to suspect that. Is this a blown seal or a head gasket issue? No water mixed with the oil anywhere. Can you do a head job with the engine still in the car? The car is a 3.4 early tech art mod done by an independent dealer and has benn driven only 3k in 10 years+.