what carb for 340

A well tuned Holley is hard to beat. Street car Id go w a Holley 650 DP. I usually run a 750 DP but I hit the track. I did notice the 650 is a little more crisp off the line but the 750 will give you more top end. I have multiple of both and mix and match from time to time depending on what im doing. Tuning is key