A-Body Holy Grail???

We should be looking for the one that is impossible to find, right? First 67 Barracuda or Dart with big block? M code 68 Dart, 1965, NOT 66, Hemi Under Glass, 1st 65 Formula S Barracuda, Ronnie Sox's 1st Hemi Barracuda, not one of the clones. I think something like that would be the "Holy Grail".