your responses will be all over the map.The 340 / 360 may be best.
best fit,light,best handling / braking,mileage,performance potential high
economical to build.....
i read somewhere that early 340's came with 485 cfm and 535 cfm avs's.
these carbs were quite small
also early 440's had 585 cfm carbs
can't say how accurate that info is but someone on here probably knows