6 Pack vs. 650 4BBL?

Unfortunately Larry Shepard is no longer with us and his shop is about 10 miles from my house
I used to talk to him when I was a young in the 70's, him and a guy named John Barker who was a engineer and a die maker at the twinsburg plant that was the max wedge guru. All the racers around called Barker the professor because he knew so much about the math that went into building engines.
As 68 hemi says, I was talking to the guys at Indy cyl heads about a year ago and they claim they have made a 440 with the modman manifold with vacuum 6 pack make over 1000 HP.