The ss track by the cockpit was placed there by Pierson to handle the sheets for a high clew headsail (150%?). Not much use today. Ditto the fair leads on the cabin top. The were for the high clew working jib of the time. Search on jib track and you will find a lot of information. This photo shows the current thinking for Bay Area yachts with 110'% jibs and 120 - 155% Genoas:

http://www.pearsonariel.org/discussi...76&postcount=3