[JoeC]

I have not seen any original pictures of a 1969 or 70 L78 or L72 that did not have the A.I.R. system on it. Some lower HP 396 engines did not have A.I.R. and some lower HP engines got the TCS system instead of A.I.R. I would think that the carb and distributor part numbers would be different for a car with or without A.I.R. The slightest engine calibration change required a different part number for carb and distributor. For example some cars with same engine but with auto or manual trans has different part no. carb and distributor. Also the fan belt will be different part number for A.I.R. or non A.I.R. and I cannot find part numbers for a 69 L78 or L72 without A.I.R. There is usually a paper trail in the part numbers.