This is my 89 C'dI which I just upgraded to modern Shimano 2x10 speed.
All the upgraded parts are either new or very lightly used.
It was a pretty economical build considering I financed the entire project by selling off old parts and a flipper bike.
brakes, rear D, cassette, chain, are new 105 5700
Front D, and levers are 6600 Ultegra, groupless hollowtech cranks (tiagra level?),
Dura ace 7403 hubs laced to mavic reflex SUP clinchers.
I haven't run t yet as it's a bit wet outside.