Thanks for the encouragement Jake, it keeps things moving!

Engine is out and on the stand. I'll drop the pan tomorrow and hope for a big nasty scored rod bearing. If I get one of those, and the others are good, I think it safe to assume the mains are okay since they are much larger, get much more oil, and are not known for issues in the Lotus 907. The number 3 rod bearing is known to be a problem though and that is the first one I'll pop off.

Replacing the rod bearings is easy since it only requires pan removal. Mains are a whole different story involving spliting the block in half and at that point one might as well do a rebuild to ensure that everything lines back up etc.......trying to avoid that.

I'll post results, good or bad.