As I mentioned before those pushrods will chew themselves up when you combine them with those comp rockers arms you used.
It is required to have a good quality hardened pushrod when using those rockers or they will chew up the pushrods. There used to be a warning about it in the paperwork when you buy those rockers.
Without going back and looking at your pics I'll take a wild guess that the pushrods you had chewed up were all on the rocker arm side and the lifter side was fine. Ask me how I know, I've been down this road before with those rockers arms. They do not mix with cheap pushrods.
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2019 Pontiac Heaven class winner
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