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Wrong, A12s used 216 as well as any other car with max cooling 054 rad



This statement is incorrect as well.
"MAX COOLING" is a "red herring" it is NOT an orderable OPTION certain combinations have it others do not. A 1969 b-body with a "054" radiator does not equal "MAX COOLING" nor mandate a "216" fan.



While I agree that Build Code N51 was not orderable as a stand-alone option (it was included on a car based on other selected options/package), I've seen multiple engineering graphics and other documents which refer to Build Code N51 as "Max Cooling Pkg Less Fan". On all of the 1969 Broadcast Sheets I've physically seen so far with B/C N51, they have all coded the 054 radiator. The engineering graphics also indicate the 054 radiator was to be installed on N51 Max Cool cars. As such, I would say that 1969 Max Cooling cars should all have the 054 radiator (barring the usual assembly line error factor).

Radiator fans are a totally different story, as there's a range of fan and/or fan spacers installed on cars coded for N51 MaxCool. For example... '69 Hemi B-bodies - both auto and manual trans - should have B/C N51 (and as a result, the 054 radiator), but are equipped with the 18" 215 fan. All 440 Manual Trans cars were also supposed to get the 215 fan, but A34-equipped (4.10 ratio) cars would also have been given the N51 MaxCool treatment with the 054 radiator just like the Hemi's. It's quite correct to say there is no mandate for a 216 fan on B/C N51 "Max Cooling" cars, since there are a large number of real-world examples proving the disconnect.

With research help from Doug Hammer, attached is a chart which walks through some of the main variables that dictated B/C N51 MaxCool and that option package's Fan and Drive/Spacer. Between Doug and myself, almost all of these have been observed on original Broadcast Sheets (indicated as 'verified'), and the remaining ones are based on an interpretation of the engineering graphics. I'm certainly open to correction if there's empirical examples of Broadcast Sheets which differ from those two line-item predictions... but I have some degree of confidence in the info or I wouldn't have put my proverbial neck on the Moparts chopping block...