Originally Posted by
T-Mar
Welcome to the forums. It's definitely a frankenbiked Motobecane Le Champion. That's almost certainly an incomplete 'zero', as opposed to a 'C', in the serial number. Based on the Motobecane serial numbers and data that I've collected, this one should be very early 1970s, circa 1971-1972. Notable are the Campagnolo Nuovo Tipo hubs with the kidney shaped holes that were reportedly custom ordered for the 1972-1973 Motobecane Le Champion, per Chuck Schimdt. Once you pick it up, there will be date codes on the rear derailleur and hub locknuts, that will aid in the dating, provided they are OEM. Partial photo assist, as they wouldn't all load for me...

The only thing that I can see in the OP's list that isn't OEM are the Weinmann Carrara brakes. It originally had Universal Mod 61 center pulls.
Here's a spec sheet of the original 1971 components. Note: earlier models would have had Nomandy Luxe Competition hubs instead of the special built Campy Nuovo Tipos with the kidney bean shaped cutouts.
1970-72 Moto Catalog Spec Sheet:
Most 1970-72 Le Champions were either teal with light ivory or white lugs or a deeper blue with white lugs. In 1972 there were a few LCs that came into the US in black with red lugs. My 1972 Le Champion is one of the black ones and the serial number 2299235 504.
verktyg