Love the videos, also its very clear that Barney corners much flatter than I would anticipate for how much travel it has nice work man. Looks like a blast and glad that you are out there using it as it should be =)....We need more people from here out beating on their cars like we do
I am by no stretch of the imagination an engine expert but cylinder number 4 spark plug has more than a little bit of oil on it. If I were a betting man, I would guess broken Ring or Ringland on cylinder 4 and possibly 5.
Coolant level up is a bit of a question though without it being much different in color.
Whats next? Change oil, fresh plugs and run it? Compression test would probably give you a good indicator if you broke a ring, compression on that hole would be down.
Bummer about the engine, but glad you are having fun with it.
Sean