My memory plays trick on me. I confuse and mix things. I may remember a dream and think it happened.
That said, I think the timing chain gets lubricated by drain back
oil from the front of the head. If the leak is where the timing chain cover seals to the
oil pan, then pouring
oil in the valve cover near the front of the head could allow oil to leak. This would explain what happened.
My 5.0 leaked there and I pulled the oil pan and resealed it. Problem solved.