273 Charger Engine (235hp or 275hp)?

Hey Everyone,

How can I identify a regular 273 Charger motor vs the rare 275 hp Dodge D-Dart engine? From the research I've done, the 275hp motors were only built in 1966.

I recently bought a '67 Barracuda that has a 273 Charger motor in it (not original to the car). The previous owner bought it around 1980. He swears up and down that it would lift a wheel off the ground in the early '80s when launching (I find that hard to believe...). The car was parked when it sheared the torque converter bolts off in '83.

While everyone has their stories, I would like to know without a doubt what motor I have. It has all the basic signs of a Charger motor (finned valve covers with black wrinkle paint, 4 bbl cast iron intake, 4 bbl Carter carb, domed pistons, Charger chrome air cleaner, etc.). The block is stamped with a C 273, my understanding is that this block was made in 1966 for a '67 car?

Is there an easy way to rule out the possibility of a 275 hp motor (as much as I'd love it to be one)? I'm currently leaning towards putting a 360 in the car, unless I have a rare 273 sitting on my stand in the garage. Any help would be greatly appreciated, I apologies in advance if any of my assumed information is incorrect.

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