fuel regulator and Holly Blue

Should be just fine. Its pressure that floods carbs, not volume. Maybe your floats are too high, take the sight plugs out on the side of the bowls, fuel should be just below the hole--sometimes a bit higher but just below the holes will get you by for now. You could even get clear plugs but don't leave them in for a long time.

That cam is big, you may have a rough idle and need to work with the carb to get a fair idle.