I'm going to tear down my engine, find out what is wrong, and decide how to best go about fixing it.
The background - While underway at 70mph it suddenly started to vibrate very badly. I pulled in the clutch and coasted to a stop. Upon dismount I found an engine covered in oil.
At the time, beside I5, I could not easily see the source of the oil. In fact, it was not until I was at the hotel that the tow truck operator delivered me to that I was able to examine the engine from a safe vantage point.
What I saw was a small hole/rupture in the case, a fair amount of oil, and a lot of fine aluminum particles. The sump had been full and was now down to about 3/4 full.
My first guess is that something associated with the balancer system let go.
Here are the initial pictures. Stay tuned.
My engine is not normally shiny. The oil covered the engine, the lower portion of the gas tank, the side panels, the exhaust, and both pant legs.
It's hard to see, but back in the shadows is a long, lifted cracked section.
Ready to go home.