Turns out position is key! Get it in the hole right and one can shove it deep and clean it out. Once I shoved it in it felt as if a chunk broke free and went deeper inside. The other two only had light amount of carbon. Since it is way late and was causing misery, figured stop at three, since number five was the only supposedly bad plug. Plus, to do the front two one has to remove the fuel lines. Can't wait to hear if it makes any difference.
Also got the oil pad glued to the new pan, but needs to cure and also haven't ordered Mobil T.D.T..