Bill called, and we had a good conversation.
While I can furnish the rod in question, I don't think that is Bill's problem, and suggested he make additional tests, to which he agreed.
Seems the rich running engine came about after the installation of a PCV.
After rethinking our conversation, and the tests, I also think possibly the PCV may have too much of a vacuum source, and is sucking in too much oil smoke, and that is what is fouling the plugs.
In the FWIW category, normally if a rod needs to be changed (unless the vehicle is driven at 6000 feet or above), it will need to be RICHER due to modern fuel, not leaner.
Jon.