Dual Quad 318... I used a 273 intake

The whole idea of having an open Platinum underneath both carburetors I think is almost obvious that you're not running four cylinders off of one carburetor and the other four cylinders aren't getting crap... Maybe possibly Idol from the mixture and 1 carburetor pulling 4 cylinders and the other carburetor just getting the air door of the secondaries or something?..
LOL.... follow me. All cylinders will run off the same carb. The left bank gets the left side of the carb, and the right bank gets the right side of the same carb.