I remember nearly 18 years ago a moparts member posting his new lifters did not have the crown on their face. Around the year 2000 a rash of lobe failures of new cams came about. It was the consensus modern engine oils have much less zinc and sulfer which was is true but other members pointed out the decline in quality of flat tappetts since they were no longer OEM. Its a shame something so inexpensive reliable and effective now requires optional $$ hardening or pre break in. Many have took the $1400 plunge and went roller conversion although it sounds like Hyd Roller lifters are not trouble free. For decades wed buy an $89 Summit/Michigan/Sealed Power brand cam and lifter kit and enjoy it trouble free for YEARS.