273 or NOT 273?

Ok I'll tell a 273 story. It was the 80s I was maybe 14 or 15 but knew what I thought I knew about cars, anyway there was a guy in the neighborhood with a 66 barracuda, keep in mind this is when the car was maybe 19 or 20 years old. He had the hood up...I walk over a clueless punk that I was and probably said "what's it got in it...?" the guy said "273" I was like "273? what is that...?" and he explained. the guy was probably 20 years older 33 or 35 etc. but that is the first id ever heard of 273. In the 80s the big Mopar was 383, 440, 340...318 etc. Chevys were 327 350 400 396,454... Ford was 5.0 , 351 Cleveland, Windsor, Modified etc. 273 to me was an odd ball never heard of it.
273 I have no problem with any of them but Id build it with realistic goals. I'd redo a 273 to put in a 66 Barracuda and probably stick to stock specs and expectations. Tune it well see what it does in street dress etc. I actually was looking at a 65 Barracuda maybe 6 years ago they guy wanted 5500 but it disappeared. Not sure if they are going that affordable now.