Carb for 340

I think the Edelbrock 650 Thunder AVS would be perfect here. Yes, a 750 is too big for a 340 if it is to be street driven. You will be spending most of your time on the street under 3500 RPM. This is where a smaller carburetor will shine through much better responsiveness. The 650 AVS has small primaries and larger secondaries. This enables you to cruise on a small two barrel, enjoying both the economy and very crisp acceleration the primaries have to offer. Believe me, you will thank yourself for not choosing the larger carburetor. Regardless of what others say.