Could be a wire/spark issue, but why is it running so rich that there is raw fuel getting all the way to the end of the exhaust?
I wish I could hear this car running.
Way over fueling the car would make it run terrible (if at all)
Raw fuel in the exhaust should be ingnited by the exhaust from the other cylinders causing a backfire in the pipes. (If it was a bad valve or no spark issue)
The totally weird part is that NO missing cylinder would EVER put enough fuel into the exhaust that would make it come out the back unburned.