Okay... something interesting happening here...
Any chances of any pictures of the Pontiac Sprint manifold?
Ks from Wichita... that does sound odd, wonder what they were aiming at? Probably gas speed on part throttle. Yes, that's very interesting, but when it got to the engine ports it would suddenly have full cross-section and slow down? But you could, I guess, put dividers down into the ports as well.