340 Chugging instead of Reving

A little oil in the chamber, a couple fouled plugs, or a vacuum leak ain’t gonna make an engine hit a wall at 3000rpm consistently.

All my schooling and experience has taught me to eliminate all the obvious easy stuff before going deep .
I'm not saying the plugs are THE cause, but that oil fouled plug will likely misfire under load .
If it's still sucking oil, that's a vacuum leak, is that okay, let's ignore it !
Do you, would you run those plugs in your car, and ignore them if you had a misfire ?
And are you suggesting locking the distributor is the cure, and now many times in you career have you cured a 3000 rpm wall with a timing adjustment ? ?

If detonation blows it up, are you gonna pay to fix it ?