if you were looking to make it a "period correct" rider you'd probably want a Brooks or Ideale saddle, the Stronglight 99 crankset
Some Gitanes were shipped from the factory with the Sugino crank set. I worked in a LBS that sold them and can recall several TdF's that came that way.
I always liked the look of the TdF with the Sugino. I really like the red dust caps, too.