Edelbrock Performer or AVS carbs for 318 dual quad?

I'm putting dual quads on the 318 that I just got running. If you are running an underhood in line 2X4 manifold (as opposed to a cross ram or a tunnel ram which require the carbs to open simultaneously) then Edelbrock sells a match pair of AVSII carbs that work progressively. One has an electric choke (primary carb), the other manual (that you fix open). They are made to work in tandem. Edelbrock still makes in line 2X4 manifolds for small block Chevs and Fords and the carbs don't know what they are sitting on.