My carb list doesn't go that 'modern', but I think that's off an 83 302 ford truck.....if it is a 1.08 venturi model (cast into side of carb by throttle linkage), you can tune it just fine for milage. Bigger models (1.21, 1.23) aren't so good.
A good base line for milage (at sea level) is 47 main jets, fuel level 7/16" top of float to rim of carb body & accelerator pump rod in the #3 hole. Assuming you don't have an internal leak, of course. Rebuild kits cost 13 bucks & are super easy to do. Distributor timing makes a big difference, too.
I have the same carb on my 258 and get 16-17 in town & 21 highway. I drive like a granny, tho.