I want the two four top for mine just for looks, thought of making one out of plate aluminum and a 1" spacer (to make the same thickness as original) but maybe just bolt the plate to the bottom for less plenum size (the article) and use the 1" thick 4 hole plastic carb spacers.
I have the Carter competition carbs 9636SA.
That way I won't mess with the my six pack carbs and leave the whole assembly carbs,intake and air cleaner stock.