In reference to the long cage adaptation:
As perhaps there really (Rally?) isn't anything new under the sun, Spence
Wolf, the man behind California's legendary Cupertino Bike Shop in the 50's
ownward, for many years offered a homemade Campy Record/ Nuovo Record
derailleur, called simply enough, the Wolf modification. It featured a long
cage he had married to the standard derailleur body. He offered this as an
option on all the bikes he sold, whether Cinelli or the French makes, for
those seeking wide gearing. I don't believe it carried any markings, so
some of you may have a very desirable piece of history, albeit that looks
homemade.
Ricardo Bulissimo, Verdi Nevada.