[Jeff H]

I still think an original engine car is worth quite a bit more than an NOM car. It's all up to the individual person what they are looking for and comfortable with. I'd prefer #'s matching with documentation, #'s matching would be second, documented NOM then finally an X code car with NOM. The price difference for an X77 Z28 in this example could be a $15-20K spread. But there are obviously other variables that come into play like the mileage, overall condition and amount of matching components.