question about 66 dart

By standard dart 2 door I assume you mean 2 door sedan, or "post" car. The D Darts were all GT's as far as I know, which would make them hardtops. There is some info on the web, I have found it by typing in D Dart on google. They were 273 4barrel 4 speed cars with a different solid cam and better springs, steep rear gears(4.88, I think), and a holley 4 barrel. Not too many left, maybe 3 or 4. Would make a great clone project.