Upgrade Trek 620 Drive Train to 9 sp
Recently acquired a well used 1985 Trek 620. I would like to upgrade to a modern 9 speed drive train with DT shifters. I am thinking Dura Ace 7700 DT shifters for index and friction options, a compact crank with interchangeable rings (Rene Herse from Compass bicycles 48/32)
and ultegra 6500 12-27.
Recommendations for new derailleurs with this setup?
Appreciate your input.