Suggestion/experience, Need a new Carb

[Kalums]

Happy Independence day!
Ok gentleman, I need a new carb that I can get to pass emissions, I currently have a Holley 9895 (I thought it was a 80555C, came in an 80555C box, no numbers on the body/plate except list-4175) took it too a reputable shop here in town to help me tune it because I got a whooping 6 mpg out of this last tank. The 9895 has a reverse idle circuit, so what I thought was full lean was actually full rich. Shop guys were pretty unanimous about ditching the 9895 as they are apparently really hard to get to run efficiently/correctly and I was told a not very good for towing anything more than a roller skate. So I'd like your experience(s) and suggestions? I do have the original quadrajet but it is seized solid and un rebuildable. I've got an Edelbrock 1407 that came on the truck when I got it, but I've been looking at a little larger CFM 650 or so. I currently have a a stock 350+TH350 +NP205 (also an Edelbrock 2104 intake) and running 4.10s...I'd like better than 6 mpg and still like to tow. I don't expect great mpg... But 6 is way too low. And on top of all of that still need to pass emissions, even if I have to retune after passing. Edelbrock AVS2 1906, Edelbrock 1904? Holley 650 brawler? Holley Avenger 670? Holley 1850? Thank you everyone you guys have been a fountain of knowledge.