I read the article. Obviously you know I’m going to call horse **** on that whole test. If you have 427 inches that likes a 650 over an 850 you know it’s a jacked up combination.
The cam timing was so far off it’s comical. That’s just a start.
Of course, I could be wrong. But I don’t buy the small carb nonsense because for over 40 years I’ve been proving that wrong. And by the small carb theory a tunnel ram wouldn’t make any power.
Sorry for the thread detail.
I still don’t have an explanation for what you are seeing. Only some weak theories which are really wild *** guesses.