Bad Day, Very Bad day

I had a similar issue years ago. I was at the track, engine was running rough, looked at the gauge, 0 oil pressure on the starting line!!! Still ran the car...
Found a badly bent push rod, and that lifter popped out, laying in the galley area!!! So no oil pressure... The valve guide dropped causing the valve and piston to meet at the wrong time!!!. New heads and pushrods fixed that. By the way still have that same bottom end in the car!!!!!!!

Bob