Which do you prefer on a stock 170? Carter or Holley 1920?

In 1965, the Valiant slant six got several different possible carb combos. Basically the 170 standard shift got a smaller carb (Holley or Carter) then the 225 (standard and auto), and the 170 auto, which all got the larger carb. I ran a 65 Valiant 170 auto, in NHRA stock eliminator back in the mid '70's, and tried several carbs. The large Holley made the most power. I cannot comment on which would be better for economy