[DAVID GAGNARD]

I have a 351-W, about 350 flywheel hp in a 65 Fastback with a Tremec 5 speed and 3.25 rear gears....Holley 600 double pumper, Eldelbrock daul plane intake.....
Cruising on the interstate @ 75 mph (2000rpms), I get 23 mpg, never checked it around town..........last trip to Florida, I put a little over 750 miles for the round trip and averaged 22.3 for the trip.....

I think your mileage is a little low, don't care for your carb either........with your set-up, I would expect in the 18-20 mpg range for highway cruising........

David