Carburetor cfm calculator

"run good". Put a 318 2bbl carb and intake on a 340 and it will "run good". Put a stock 318 cam in a 340 and it will "run good". Put 318 manifolds and single exhaust on a 340 and it will "run good". Will it run better than a 340 with a 3310 Holley sitting on a LD340 with a 340 cam and 340 manifolds with 2.5" dual exhaust. NOPE. The 2 bbl set up 340 won't run any better, won't idle better, won't drive better, just be a ton slower.