Carburetor cfm calculator

Dan the man said
That's kinda what I'm looking at doing. Would the 3.55's give the best bang for the buck and what would be the correct tire size for the 3.55 gear ratio?

There's no correct tire size 26 in tires (245r 60 15) with 3.55 would be the same over all ratio as 28 in tires (275r 60 15) with 3.73.