Exactly what makes a MOPAR a "Matching Numbers" car?

I remember the episode. Mark found, after he got into its resto (which seems to always take him many years) was that it was rebodied. Or lets just say, the vin tag does not match the body!!!! The vin # on rad. support and back side of car were not right. NOT good on a car you will spend what? maybe $80,000 paid to Mark??

The anal resto guy wants everything oem right down to what they seem to think is dated in the correct window. and for sure the vin on eng., trans if what, late 68 up. ok Then there are the so very few survivors that still have all or most all their parts and pieces that came on it from the factory. Dated air in tires.

I personally enjoy knowing what is correct as to how they came from the factory. It does not mean every car I touch as to be built to such! Some cars deserve such. I used to find a few "matching #" cars back in the 80s, fewer in the 90s and hardly ever now! Now days,,, I always look for rollers that I can build as how I want without fuss or criticism. Well actually, the older I get the less I give a chit who critizes!