Quote Originally Posted by Bill R.
IF the valve happens to be hangine open when the piston comes up, the piston smacks it HARD and slams the valve closed, the valve hits the rocker arm HARD and since the rocker arm is usually in the process of coming up towards the valve at the time , the weakest link gives and thats usually the rocker in this case.. At any rate when the valve springs get old the rpm at which they float can change and get unpredictable.. .

This is what I was thinking when I saw the pics. It looked like the valves hit something hard (piston) & snapped the rockers. Popping the head off will answer that question.
So it might not be such a good idea to explore the extended RPM range of my EAT chip on a regular basis at 142K?