Carbs get so involved so fast that I always listen to the experts. If what they have done is not exactly what I'm doing I will experiment. This sounds similar to a WCFB since primary & secondaries are thrsame size. My first 4bbl was and AFB on a warmed up Ford flathead sitting on an Edelbrock manifold. The most dependable street flathead I ever had. No BS linkage basically I just bolted it on and didn't try to understand it.
The secondaries on your carb sound like the beginning of sophistication on these things. My son & I built a 750 cfm Carter (Edelbrock) for his supercharged Studebaker V8. It ran mechanical secondaries to dump the extra fuel according to boost. I gets over my head pretty quick.
