318 head porting for the average joe

Quoting him to me ain't gonna help your case lol, I have zero interest what that a$$ thinks, your way smarter then him, you don't need to quote him to make a case :)
Sometimes even a blind squirrel finds a nut. Go and think about that sentence and figure out where your blind spot is.

I'll leave you with this: Just because a head flows 250 cfm that doesn't mean that is what the engine uses.