Lifter failure

I don’t build engines for customers anymore.
But if I were, none would be built with a flat tappet cam(unless it were a rules thing, and then there’d be zero cam/lifter warranty).

That being said, I would possibly still risk one for myself on a mild enough combo.

I just ordered a HR for a guy who had the fast rate HFT cam in his BB stroker go flat with under 400 miles on it.