Just to clarify my thoughts Rob, while i did say that the current carb was doable with some tuning, if i was going to shell out 400ish bucks for a new one and had a light car with a 440, with a vac secondary carb i would rather have the capacity of the 800cfm range if i ever needed it. Hey, it's a 440 dart, how can you not jump on it heavy every now and then.:D