In my opinion, based on research I have done in the past, the 215 is correct fan blade for a '69 Hemi 4spd.

The 1969 Chrysler parts book shows the 215 for the Hemi (auto and 4spd), and the 440 (4spd only). You may notice there is a mistake in book, the Hemi is not listed for B body cars.

The 1969 Chrysler service manual also shows the same fan blade used on Hemi auto and 4spd, and 440 4spd only cars.

This info also agrees with the BC sheet info from Dan.

You have a good 215 blade you said, so great!

Parts book info and service manual info below.