Here's an update on my '74 Le Champion. I found this from a CL ad and it was located within walking distance of my house! I walked the dog down there one evening and walked the bike back. No the dog didn't go in trade, Wolfie came back with me too

The bike was converted to single speed, fortunately without cutting the hanger, had crap wheels, etc so basically I got the frameset with original <74> Campagnolo crank and pedals, BB, headset, and seatpost, original Silca pump, and the Dura Ace brakes - so fortunately all the French / Swiss threads were taken care of and I had a 22.0 3TTT Record stem in my box of goodies. I also had a 74 rear NR derailleur (minus pivot bolt) on hand, NR shifters, a set of HF Record / Super Champ wheels, and the fun and funky Hecho en Mexico Nitor saddle all hanging in the shed. The front NR derailleur also came from my parts box but is not period correct but alas my other (correct) derailleur has a loose pivot shaft.
Thanks to shnibop for the 3TTT Record Gran Prix bars and NR pivot bolt I only had to pick up the BB cable guide. I even re-used the old black brake cable housings. Clearance with the chainstay precluded a six-speed cluster so I put on a wide range five-speed SunRace from the box. Out of respect for the recent outpouring for the Team Champion I chose orange Tressostar bar tape and orange generic / cheap toestraps.
So, here it is - hope you like it...