Not enough oil...that makes sense.

That is the push rod that was under the broken rocker. As I piece this problem together, I'm thinking that maybe it got out of place when the rocker split, but still in friction contact, and oil flow then not there: Broken rocker first problem.

I'm not sure about why they others bent, and the studs broke.

The only thing that I know was an introductory problem was the severe detonation.

I'll be pulling the manifold this weekend, and looking at the lifters.