my slant buildup

Yeah /I can see oil passages being plugged which would keep oil from being able to get to where it can do some good.
This seems like all after thoughts, vs what Mopar spec'd as they were designing this engine, I'm sure the prototypes they were experimenting with, were lab-clean/ way before they were put into cars for people to abuse. Meaning that, at that stage people weren't worried about such things. I mean let em sludge up, blow up so the public can go buy another car, right?
I can see tighter lash being an advantage as far as less "slamming" of parts together, less shock within the valve train, as long as the thermal expansion thing doesn't interfere and make everything "too" tight. Which would cause compression loss and burnt valves