Dura Ace 7400 8-speed shifters, and probably XT M737 or M739 derailleur.
Edit: I think it's the M739 as that had a flatter cage.
Dura Ace 7400 8-speed
DA only works with DA afaik as the pull ratio is 1.9.
Well they look like these which are 7400:
Wasn't it possible to bodge pull ratios by attaching the cable on the wrong side of the clamp or something?
These are 7700:
Might be 600
@Thrust started
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Dura Ace 7400 8-speed shifters, and probably XT M737 or M739 derailleur.
Edit: I think it's the M739 as that had a flatter cage.