GW,
If you get to the point of wanting to tear down the eng, drop the
oil pan first. look in the bottom of the pan for metal. remove the
oil filter and carefully cut it open to expose the paper element to look for metal. Look between the connecting rods for bearing material hanging out between them. with your wrench on the damper bolt, move the crankshaft in various positions and wiggle the crank back and forth. if a rod bearing is shot, usually you can see relative movemant between the rod and the crankpin. Start there and keep us informed. sorry to hear of your troubles.
The Cleaveland is one of my all time favorite engines.
Steve