cold feet about potential bad lifters

George Jets said

It just went bad ^^^ because things were not 100% right. Was the oiling System Primed? etc. etc. etc.

Has a lot to do with a 200,000 mile engine, with lower than average oil pressure, and the new aftermarket heavier than stock valve springs used on initial start up.

Not enough oil pressure and volume, and too much valve spring pressure on unmated surfaces makes cam lobes go away. (200,000 mile oil pump too)

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For sure, still makes me worry though I could follow every procedure to a T with a fresh-rebuilt 440 and still have cam/lifter failure. But then multiple members said they are running the same lifters as the OP with no issues so... idk this ****'s dumb lol. I agree with @aaronk785 it's not that friggin hard to make a lifter, makes no sense why this is still an ongoing issue and it's been what, 15 years since people started having flat-tappet cams go bad?

Hopefully 3D printing technology will continue to improve and at some point soon we can just print custom engine parts instead of relying on garbage offshore stuff made in commie China... lol (for real though)