i have both boxes in the garage and have verified tat one is CARB and the other not, the CARB box (69727) is taller too...lol... but the tank is def taller and has the emissions stuff on it...
when ordered online, seems as if you get the regular one, even if shipped to CA... when in side the HF, they only have 727s
the 730 fits inside the stock doodlebug frame nicely (without the engine adapter), but the 727 seems to be a little taller...
730 in a doodlebug frame
727 in a bonanza