I saw this post over on the other Forum and now remember seeing it some years ago as well. I agree with their conclusions generally but would add that:
-Some FE oil pans, even with unclogged head/valley drains, can and will pump themselves dry at sustained high rpm levels unless one overfills the pan from factory specs. Yes, lifters are somewhat self-limiting but that's only part of the issue. Keep in mind that passenger car pan design wasn't optimized for high rpm sustained engine operation, especially with high pressure pumps.
-OEM 427 S.O. stuff used cast cams and cast ditzy gears, all good as noted even with high oil pressure. Today, mixing say a steel roller cam with the wrong ditzy gear (like a cast gear) will eat up that gear in a hurry. Likewise, a bronze gear on a steel roller will wear faster than the correct steel cam/steel gear setup or what is advertised as a compatible gear material by the cam maker. Pays to closely check any brass gear often for excess wear especially on a steel roller.
Interesting too that I do believe many of today's dizty gear failures are often ascribed to excess oil pressure when in fact they could be caused by low ZDDP content in some oils and/or incorrect gear placement (too low or too high on the ditzy shaft) when one replaces a gear without closely checking for the correct measurement. JMO.
