1965 DART GT 273 4BBL

I understand that GT was a body trim and could be had even with a slant six engine. I think all the 4 bbl 273 Plymouths were termed "Commando" engine and had such on the air cleaner and the Dodges were "Charger 273". The term "HiPo" is also used (slang or true factory name?). I recall the "Dart Charger" was even more special. A member here is the expert on 1965.