for your app i'd want to be below 440 lift and sub 260 duration with a 110 or less CL, preferably with a split pattern to favor a little exhaust scavenging.
i think the AVS 2 is great carb, but as mentioned if you're looking to absolutely maximize cruise a small primary big 2ndary would be the move. or like a holley economaster (barf).
and timing. you're gonna need to figure that out too...