The ones that get me are when someone creates a Hot Rod and claims classic. I hope I don't upset anyone as the following were built to the Targa framework, but a fairly good number of long term Targa competitors have left as a result of the following and similar.
Datsun Z with forced induction Chev, still claiming original year, Charger with Jericho gearbox, still claiming original year, Torana Hatch with LS, same claims.These are not the only ones, and as said above were built within the guidelines, but the essence of "Classic" is lost, and the outcome has been that the true classics go away.
Against these, and at the time are Avenger (factory race history) in original form, Renault A110, still running as built, solid discs, factory box, engine prepared as works, etc etc.
Rant over