1965 Formula S w/AC: What is Factory Correct Fan?

I have the '65 parts book open to Fan Assembly. It shows 2121971 for 6 cyl Valiant/Dart no AC (no blade number shown) and 2206356, (six blade) for trailer towing and AC 6 Cyl Val/Dart cars. For the 8 cyl Valiant/Dart it shows 2658984 (no blade number shown) and 2532257 (six blade) for trailer towing/heavy duty fan, and a 2463657 (seven blade) Field Installation fan. I believe that is what I have pictured. Yes, it's confusing, there appears to be several fan options.