That's interesting but I would have done a 4x2 in a completely different way. I have seen a low profile 'cross-ram' style intake where the runners cross each other.
http://www.carburetion.com/Weber/wildv8.aspLook for the scrub K350 DCO version.
The reason I'd prefer this style is to make the runners a little longer. Also, it has a lower profile if you're fitting the engine into a car. Also, the runners don't have an upturn in them, making them a more direct shot into the intake port. And notice how the runners are interleaved in the scrub intake. Shaping the intake so the runners line up better with the flow of the head's intake ports would also help.
Of course, adjusting the rockers would be a pain with the carbs hanging over the rocker covers.
Best regards,
Paul Menten
Meridian, Idaho