Wow. I have a 1973 TdF in the same paint. I am the original owner. I had it completely restored 3 years back, including new paint. Mine had a Sugino crankset (better than Campy Nuovo Record) and Campy Nuovo Tipo hubs on tubular wheels. Seatpost is a tight 26.6. French BB and headset. Rides great, although I've known for years that it can go into violent speed wobble at around 40 mph - in certain conditions.

I replaced the crankset for a triple. Used the same Sugino BB cups, and just used a longer spindle. Fortunately English and French cups accept the same spindle dimensions. $2 of new balls of course.

I replaced the fork outright, as I had crashed the bike hard 30 years ago, and decided maybe I should not take my chances with a bent and then unbent fork. Replacing the fork allowed me to covert the headset over to a standard ISO 1" threaded.

I am using a Simplex SX630 rear derailleur, as I still have the unmodified Simplex dropouts. Do not let a mechanic work on your rear derailleur, as they will try and unwind the derailleur from the front, and they will break the spring on the top pivot. The Simplex derailleurs install from the back of the hanger.

Before the repaint, I had the stay spacing widened from 120 to 126mm. I have a lot of 7-speed wheels.

I regret changing out the tubular wheels to clinchers, as the bike now rides like a tank. Although the new wheels are high-end (Campy C-Record hubs on Campy clincher rims), the tubular wheels were so much lighter and responsive. But that is the nature of the clincher vs. tubular issue.