Carburator size

Any good fuel system needs a fuel return. People on this forum have argued me down on it, but I stand by it. Even with a fuel return, the single inlet carbs do not circulate fuel as completely as a dual inlet.....speaking strictly of Holleys here. A top plate bowl carburetor such as a Carter or Edelbrock, they are different entirely. When you have a dual feed inlet, even with no return, they generally move fuel enough to keep the rear bowl from crudding up. But the single inlet carbs have a complete disadvantage. Even when you add a return, they never fully circulate fuel like they should.