Interesting, some models had both the 273 and the 318 available. Others just had the 318. For instance, according to my Galen book, Barracuda's didn't get the 273 but got the 318. Probably because the 340 was available in that model in 68. I don't see 273's available in any Coronet's or Chargers but they were available in the Belvedere's and Satellites along with the 318's (including the wagon's but the 273 wasn't available in the sport models like the Sport Satellite unless it was a wagon. 67 was a transition year. Pretty crazy to keep track of. The rarest one listed with a 273 is a 68 Sport Satellite 9 passenger wagon. 393 produced. No transmission breakdown though. .