Here are a couple of articles that should lead you in the right direction; with the cover off you will get different numbers than with the cover on do to the magnetic pull of the relays; you should always check the final charging voltage with the cover on .
http://www.ytmag.com/articles/artint29.htm
http://www.42fordgpw.com/voltage.html
To me pictures,diagrams and schematics are easier to follow than printed directions any 2 brush generator Ford, GM or Chrysler are simular in operation there are A type and B type field schematics the difference being the Voltage regulator is
before the Field winding
(B) and the other
(A) meaning the voltage regulator regulates
after the field Winding.
Regards,
Brian