That red 69 440 'Cuda that sold for $48K had the original motor, buildsheet, correct 440 only manifold and I think even window sticker. Very documented and all original sheetmetal. Very tough to find an original M -code with that pedigree. Restoration costs to that level are $60K and up to have someone else completely do the car.
The blue car the original poster is talking about is missing some very expensive hard to find items. Then the car will have to be restored.