It depends on the specific shifter's cable pull. I had suntour power ratchets (awesome) on a vintage frame into which I stuffed a 9 speed cassette. The shifters did not pull enough cable length to cover the entire cassette, which meant adjusting out either the top or bottom cog.
Later model DT shifters - anything circa post-freewheel - will cover up to 11.
Dia-compe and Rivendell make vintage style DT shifters with outstanding fit and finish, though for the price you could score Dura Ace.
Last edited by 1983; 11-11-15 at 09:32 AM.