My 340 getting 6 mpg

str12-340 said
So I'll chime in on carb choice. The carb you have has mechanical secondaries. When you floor it the secondaries are wide open no matter what, plus a double shot from the accelerator pumps (they did that to cover the massive sudden vacuum drop in the carb). You could use a Holley with vacuum secondaries, or an Edelbrock AFB or AVS2. All those carbs have secondaries that are controlled by the demand for air/fuel by the engine. With them you can guess high on the size of the carb and the secondaries might not be all the way open until the top end rpms. I'd try an 800 AVS2.

If I can get 15 mpg out of my 340 with 2 Eddie AFB 500s, you can do better than you are doing! By the way I absolutely love your car!
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Thank you for your response!

I will take your suggestions into consideration. At this point ive spent the money on this carb. Mopar official will be coming this Saturday to tune it for me. And we will see what we get. But i have been told by multiple people about the edelbrock AVS. I will keep an eye out and most likely snatch one when it comes up. Just to have it

Secondly. Thank you for your words about my car. If your on instagram. You can see more pictures on the cars profile @64whiteghost