'A-Body Showdown' ~ 1967 Dart GT 273/235 HP vs. 1968 Dart GT 318/230 HP
That is way too quick for 'all stock'.
Though the '1965' 273/235 HP cars were the 'quickest' of the '1965 thru 1967' 273 High Performance packages.
Reasons;
* The 1965 cars were equipped with a 'Low Back Pressure' straight thru muffler.
* 4-Speeds were equipped with Hurst Shifters
* A-904 Automatic Transmissions had a higher RPM shift point
Also, some state that the 1965 273 Engine Blocks had closer to 'true Specifications', with the Step Domed Piston
closer to minimum measurements. {ie; Deck Height}.