My buddy setting up my old set up. 600 x 2 AFB on a 11-1 - 360 w/a solid comp 294S, Edelbrock heads 1-3/4 super comps headers. Minimal tuning, ram very good.
Linkage is the Edelbrock stuff. So you can see you get a reasonable amount of primary throttle before the front carb kicks in. By this time of the rear throttle opening, your moving pretty good to begin with.