Read paragraph beginning "Along with the above changes and..." just before "1968 Production Numbers". Geoff, have any supporting docs?
And as for tubes, what about the cars that use wood or steel spoke wheels? No tubes? That would be difficult to manage. Someone better tell that Model A owner who lives up the street to permanently park his car if he doesn't want to alter it.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching