Need recommendation for a Carb for better MPG!

I have a 5-speed 72 Dodge Demon with a 340, Edelbrock 1406. Looking for possible recommendations for a carburetor that might give me better mpg. I've recently been able to drive as a simi-daily driver but it's hard to get much better than about 17 mpg driving like Miss Daisy! I would be happy with 22 or better and I'll take any advice I can get.
Thanks anyone!