I have seen the very detailed 201hist spreadsheet that details all of the changes to the J over the years.  Is something similar avaible for vintage Mooneys?  Of course there are the aerodynamic updates, but what else?  For example, what does a 74 F offer vs. a 67 F?  Do all Fs have the split folding rear seats that weren't added to the J until the 80s?  Was electric trim ever an option?  And so on. What I am really trying to determine is the feture set offered pre-J and if there are any opt