5 bent pushrods!
Do you have a rev limiter?
Bent push rods come from valve train interference...or loss of valve train control by the springs.
Interference can be ruled out when done by a pro that does this every day.
Have you checked for any broken valve springs?
Damaged (intake) valve tips..mushroomed?
Straight edge across valve tips to look for stretched valves...especially intakes.?
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