Super Six 2bbl or Hyper-Pak 4bbl in 270 Dart w/225ci

So with the 2 bbl Super Six setup, I thought it would be a direct fit because it was previously used on the 225ci Slant Six wasn’t it? And if it’s not a direct fit and needs modding is the performance gains really worth it? Because I’ve had people offer the option of staying stock with the single barrel carb. In that case, if I stayed stock I’d just send the carb out to have it rebuilt and tuned. What do u think?
IIRC someone in the past said that the super 6 with the 2 barrel was 10 hp more than one barrel 6, you won't feel an extra 10 hp in the seat of your pants