[Formulas]

What comes to my mind is those crane rockers they are entry level
Perhaps your over traveling them the rocker stops pushrod continues to push and pushrod bends you come along and put new rocker arms on a engine that has bent pushrods still notice something isnt right pull it apart again and find bent pushrods

There is only so many things that can bend a pushrod, valve being able to travel the lift distance without binding on anything that parimeter seems to be good

Spring pressure and RPM demands to high on a lesser pushrod

And rocker travel this is why some stamped steel rockers are long slot to be able to travel the lift distance

Any given rocker may be rated for a max lift this rating also depends on where the rocker is sitting before lift starts

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