Yes, the 273 was in a '66 Barracuda. It wasn't fast, but by comparison to other sub-300 cubic inch performance engines it more than held its own. The handling package and disc brakes also helped the fun factor. 340 is in a '68 GTS convertible, 440 is in my son's '67 Dart GT convertible. In some ways the 273 was more fun on the street than the 440 because it would take longer to get into trouble. That doesn't mean that we're going to "downgrade" anything. I also put a 440 in my '67 Barracuda convertible.