I think we can now safely believe that the 383 330 motor is not marked HP and is painted blue and was the standard motor when you ordered a 4 bbl with a/c whether 4 speed or automatic! I'm glad I have a 4 speed BH29P9 with A/C. I know which 340 it has! It's turquoise but so are the 340 non A/C cars. Hey! Maybe all the 69 340's are the same whether a/c or not? Which brings back the question why did the engineers feel that the 383 a/c cars should be 330 HP? They didn't put a 350 HP 440 CID in a GTX with air?