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I go with John and Jason on this one. Been running a 1406 Edelbrock 600cfm for years on stock original 350, new crate 350 and a hi-perf 350 with high rpm cam putting out 400hp. IN each case you may have to tweek the idle or choke a bit but they run reliable and strong. I've tried a 750 and wasn't happy with the performance/mpg it gave me. To take advantage of a 750cfm carb, you need to have an engine that will breathe enough to absorb the capacity of the carb with either cubic inches or heads with a cam etc. It's hard to beat a good 1406.
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