^^^ This. Once upon a time I had a tired old 318 I swapped to 4 barrel, Eddy 600, when I wanted it to it performed noticeably better than the 2 barrel with no other changes, and when I kept my foot out of it, got better mileage than the 2 barrel. And they are EASY to tune and rebuild.
And if you decide you want to run a square bore carb I have an adapter plate I would GIVE you if you pay the cost of shipping, it just needs cleaned up a little.