Washeable Replacement Filter For Weber DGV Carb Assembly

Last time we chose a manifold based on flow volumes, and a carbie based on personal choice, but which combination is best on this engine?  With the engine finished, it is time to look at a variety of carburettors, inlet manifolds and exhaust extractors, to fnd the most suitable combination. There are a lot of fgures, but they are necessary, so bear with me.