what you are proposing is that this mustang was hand built, brand new, to look exactly like a factory 67 chevelle, including 27 years of wear and tear, with bolts hand-tightened to factory specs, and a thick layer of greese to add to authenticity.
In the universe, what is the 27 years of wear and tear or the thick layer of grease equivalent to?
If it's light speed and star distances...well, I know I'm tired of that subject, too
. Are there other lines of evidence?