Considering this topic has spread like the bottom of a fat lady taking a seat, i will expound on my infinate wisdom, or lack there of.
#1. We don't know what we don't know. It seems we know even less when we challenge others.
#2 No rule is ever perfect.
With these thoughts in mind , i offer the following.
The best we can come up with are trends, because it seems there are always exceptions.
Case in point; i was told by someone from Indy cyl heads to NOT run over .825 intake lift with -385cnc-13 heads. Ok, why? Something about the flow goes negative at about that point? (Can't remember the reason)
So my cam with .868 lift would be wrong, correct? Maybe, i don't know. They base thier comment on 350 motors built with those heads. Maybe they are right,,,,,,BUT, nobody has infinately tested all the possible changes to all the possible combinations, including porting, bore size,add infinitum. And that cam made VERY good power in my 550 inch 440-1 motor. So, i keep looking for trends, from lots of sources.
And finally, to ALL, have a nice day, and thanks for your input 🤕😁