All the 4300 D0OF carbs have an automatic, hot air choke. I have 5 or 6 of the AB (4 speed) and AC (Auto) carbs, the difference is that the AC carbs have the kickdown rod linkage and a dashpot, and the AB carbs have a carb solenoid, and no kickdown lever. I've seen several AD carbs (auto, AC) but have yet to find one dated right for my car that wasn't outrageously expensive.
. I've been hoarding parts since the 1980's, and have seen a ton of these carbs over the years, I've never seen one with any of the other suffix's mentioned in the MPC (C,D,H,Y,or Z). I always thought the AA carb was the 4 speed AC carb and the MPC was a typo as I don't think they ever made a 4V Cleveland Mustang or Torino with a C4, but I've never found a AA carb to confirm my suspicions .
Look in the 70 shop manual for the carb spec's and there should be some hints on how the carbs are configured, I just don't have my manuals handy.
Hope this helps, John