273 commando/Charger

Ok, so if I have this right, Dodge did not have a 273 commando, it was referred to as a 273 charger. Plymouth had a 273 commando? Is this correct? I'm doing a 66 Dart with a 318 but want to dress it as a 273 (commando)?? (charger)??? I've seen the stickers available. I have the 273 commando??? charger??? valve covers wondering about the air cleaner. I know what it is, not sure how to dress it. I want to remain as close to factory as possible.
Any help is appreciated.
Thanks.
Jim