detailed Cruise Performance Bellanca 7 ECA

Hello, hope You all are well.

For my 1977 7ECA I have the OM-003, however in my copy there is only little cruise performance information on page 4-4. Has there been an update to chapter 4 over the last years? I understand that OM-004 is only applicable to 7ECAs from 1981 onward...

Thanks in advance,

Jesper