You are right, I will be basically rebuilding the engine for third time. With a sleeve in order, I tore it down to the bare block for repair, (.060" over already) I will be looking at a new set of rods as I don't know their history, (or if the other pins are loose too. I plan on experimenting with my press with a little pressure to see if it appears that the others are right behind this bad one).
I don't if the rods were bushed as I have never seen them apart from the pistons. I never thought of that. Is that a normal repair to resize the small end?
On the spark plug, that still has me scratching my head. There was no head gasket leak. It happened on the highway apparently as a result of overheating. There was nothing left of the center electrode; it was burned pretty good.