Very good Facebook video. Thanks.
I'd always thought about a snorkel sort of an intake going up from the carb, back and up over the roof into the free air (not so good for the rear view mirror) or a right side mounted scoop ducted back to a closed airbox. In either case you'd have the coolest air available under positive pressure. I have no idea how much power that either of these items would add - perhaps someone here wiser that I has. In the end, I decided new heads or a cam would probably net a bigger horsepower increase per buck or fabrication hour.