440/ RB Weber manifold anybody?

Have you priced IDF Webers? 4 big ones will set you back >>800. This will also be 2 feet tall once the carbs are installed. Smaller are cheaper, this 40 IDF is a steal!
https://www.amazon.com/Carburetor-Barrel-Volkswagen-Beetle-Porsche/dp/B07TDG1MFY/?tag=fabo03-20

EDIT: you only need 2 40's as the CFMs are about 430 a piece. and they are NOT progressive. Think of an 850 Holley double pumper with a 1:1 linkage. Hope you can feather that throttle. >>>Actually on an IR intake, you'll need 4 as they pull from one venturi only. Not the 4 of a standard common plenum intake. So an almost 8 liter motor will pull 1l per intake event through one of those carb throats. You'll need some Weber carb for that considering a 2180cc VW works great on dual 44 IDF's pilling 545CC per intake event.