New roller cam...

Lol.. I know that . But I do believe hyd flat cams and lifters are not what they used to be. Or maybe it’s just the agressive lobes and higher spring pressures.
I don't disagree. That's why I never use any "new" hydraulic lifters. On this Chevy 350 I helped my friend with recently, I LUCKED SLAM OUT and found a set of the old Isky anti pump up lifters of all places....Summit! IT was the only set they had and when they got here the box was so old it had yellowed and was starting to separate. They went on top of his used cam and broke in really nice. I replaced his old ones because it had sat up so long they were all stuck. He's still driving it all over. We got luck on that deal.