[Snakebit]

A rod going down the center just like your are looking for. It was on a set up with opposed carbs. I wish I had taken a picture. I plotted the Kirkum set up of the old style linkage. Using 3" connecting rods center on center, the drivers side lever was set at 23 degrees pointing up to thr right, and the passanger side was set at 70 degrees pointing down to the lower right.