[DAVID GAGNARD]

I think a lot depends on your engine build and the rpms you want it to run the best at.......

I have tried no less than 6 carbs (from 600 cfm to 770 cfm)(both vacum and double pumpers) on my 350 hp, 351-W over the years and a 20 year old Holley 600 double pumper I rebuilt gave the best results, both on the drag strip and on the street mpg wise....

My motor rarely sees anything above 5500rpms........most street driving/cruising done at or below 3000rpms and she still gets 23 mpg cruising on the interstate, the motor is in a 65 Mustang Fastback.......

David