Ok, I AM SO CONFUSED!!!! You removed the valve covers and are missing 1 "rod?" or "pushrod". My guess is pushrod. 3 holes in the oil pan could be the reason for missing 1 pushrod, but more likely a broken rod caused the holes in the pan and broke the camshaft. The pushrod missing was a result of a broken camshaft. Just guessing but excessive rpm's may be the culpret. My guess also is if the cam is broken the block is probably toast.

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"