That's good to know, if you care to run them.
Clevite's i use don't.
Acl, iirr dont.
They dont really matter imo. The rods are spraying oil @RPM and the cam is doused..as well as the lifter oil feed holes.
This starts to become the oil the timing chain more drilling holes, vs bolt with hole vs bolt with no hole and just drip plate. Lol
Ive run both ways, no issues either way on squirt holes and hole n no hole upper bolts etc..
