1971 chevy c10

[jagwarman]

Hello everyone,
I recently bought a 71 c10. It is fairly hard on fuel mileage. Here is a bit of info on the truck. It has a 1969 z28 302 short block with mid 70's 350 heads , stock intake with a 750 cfm quadrajet. engine rebuilt with 030 pistons and stock cam with cast iron manifolds, th350 trans and 373 gears in the diff. it get 13 mpg on a good hwy driving day around 10 in town. I know I just jump up the rear gears to a 3:07 and put in a 700r4 trans to help with mileage. But here is my question, if I were to replace the intake and carb with a 2 barrel setup like a Rochester 2gc , would it help my gas mileage much? I am not after performance just hwy cruising. I am trying to keep a low budget for now. Where I live I just run a lot of miles. it is 15 miles just to a gas staion and 40 one way to Walmart. The truck keeps flirting with all gas staions. lol Give me any and all thoughts please