273 is it good engine?

I wonder how many turn down a 273 for a 318 because of "displacement"...like the comment on the Chevy 283, most guys go for the 327 or 350...and just pass on by the low cube engines even though they have good internals.
Are 273 and 318 same dimensions? I’m reading 64 was first year to fit V8, that means 273 not 318, correct?