What sucked was at that time about all you could get was the chinese lifters. They weren’t all bad, but it was something like 40% that were just throw away junk.
As always, the lifters were the last thing we thought about. We sent the cams out to be tested, we changed break in oil...all kinds of voodoo crap and finally we ruled out everything but the lifters.
Lost a TON of money on that junk. And, as an engine builder it makes you look stupid.