I have a '66 fastback that's cloned to GT-350. Of late I've determined a possible bogus VIN. The VIN starts "6G07A....". It's been legally registered under this VIN for at least 25 years. I've recently learned that the second alpha-numeral should be an "F" or an "R" or a "T", and 07 stands for "coup" not "fastback". The G and 07 should not be there. Does anyone no anything about such matters?