My experience is limited with 235 carbs. I ditched the Rochester when it developed a leak, tried the holly weber from the pinto/vega era. Works well but too small for the top end Tried 2 holly webers, an expensive lesson in after market performance parts (the fenton intake was junk) And am now considering a single weber 38. It's supposed to be good for 6 cylinders with around 250 cubic inches. Not eager for another expensive lesson. Maybe another vintage carb?