340 Six Pak...smokin', or blowin' smoke?

Don't they make throttle plates with angled idle adjustment screws now for the outboard carb? And metering blocks that make jet changes easier? I thought I saw somewhere it is available now.
Weber makes them for center hung bowls on the Holley 4 barrels. I would guess they might fit the center carb?
Thought the outboards used metering plates though.....