What type of dart do I have?

Back in the summer of 68, I looked at a 67 Barracuda fastback for sale, 273 two barrel with four speed. Silver with a black interior. Really a nice looking car, but the car lot was asking $2750 for it, which I though was too much. Plus, I wasn't too interested in the two barrel. Not long after, I found my 65 Commando 273 four speed Barracuda for $1150.

Quite a few years later, I looked at a 67 Barracuda coupe with a factory 318 two barrel and a four speed. I would have bought it if I hadn't already had a 67 Barracuda coupe. Friend of mine bought it, kept the 318 and replaced the four speed with an automatic. ???

Who thinks of these combinations?

By the way, is the carb on the OP's Dart a correct 273 two barrel? Looks too big - more like one from a 360 or 383 to me.