I think you will find the braze-on shifter levers are different internally and will not mount on the strap without significant modification. You could try these instead
http://www.sjscycles.co.uk/mobile/pa...air-prod20973/. Modern Strap-on shifters are fugly and no love goes into the strap at all. If you can get an old pair of say 600 Arabesque or 105 Golden Arrow strap-ons I'd be very tempted.