Fuel pump pushrod failure

Has anyone else been struggling with fuel pump pushrod wearing out? My dad has had three fail in two years on two different big blocks.
The car only gets puttered to shows on weekends. Super low miles.
Two of them were from comp he can't remember the third but it was from the parts store.
Do we need to start hoarding OEM fuel pump pushrods?
Is the old man screwing something up?