I have also seen in an Edelbrock page on the net that the newer carbs that were either AFB or AVS style as it may be both have an off idle part throttle system that is not the transfer slot. It actually has a small nozzle in the primary throttle bores that will pull fuel just past the transfer slot to help the transition from idle to part throttle. I was surprised to see it as I did not know any Eddy carbs had that system I guess its kinda like the 3 circuit Holley Dominator system.

The system reminded me of the Quadrajet that has a secondary pull over system as they have to holes in the secondary throats that pull fuel out of them as the air valve goes past the holes when it opens. They actually call it a secondary acell pump in some Quadrajet books.

But I wonder if your Eddy carb has this part throttle pull over system ? Ron