67-69 Dodge Dart, which is what?

The GT was usually a /6, but could also be a 273 in 67, or a 318. The GTS was 340, 383, 440. GT Sport in other words.
A Dart post, has a post between the front and rear side windows, unlike a hard top.
A Dart 270 was just a different trim, I 'believe' a base model, lower than the GT trim? Someone fill in if I'm wrong here.
A Dart Swinger also could come with a 340 I believe.