Looks like it's set up similar to my '83 600, which I've aimed towards a 620.
Isn't looking Helicomatic to me, but I'd need to see more - like the wheel pulled.
Mine:
Front: Cyclone MkII FD with a 52/44/28 crank. Your large/middle ring gap may be smaller.
Rear: MkII GT with a 13/24 freewheel (Suntour hubs, too)
I put bar end shifters on mine.
28*24 gives me a pretty low gear, but what kind of touring (weight carried + terrain) are you tackling?