OK, I pulled the engine today and dropped the pan. No major chunks of metal, but I did find the issue.
The number 7-8 Rod journal on the crank was hammered. Probably caused by the number 7 rod bearing which was extremely worn and missing a chunk of bearing material and the number 8 rod bearing which had spun in the rod and was wafer thin and both halves were nested on the rod side of the crank.
Looks like I will be doing a full tear down and rebuild. This is an RPO L30 Spec. engine, (275hp). I think I will rebuild it to the RPO L79 Spec. (350hp)
