273 Stroker for ***** and giggles

I absolutely cannot fathom this idea of uniqueness.
No matter how you slice/dice a 273, it still has wee small bores, almost as small as the mighty 225; and stroked? it might as well be a stationary engine. With so many better options, I sure wouldn't go this route even if I was ElonMusk.
I won't guarantee that nobody will care at any car show, but I think only another guy like you will give it a second look. One thing that you are sure to get an earful of is this;
"you shoulda built a 340";
you'll get so sick of hearing it, that you'll just quit going to shows altogether, or,
you will put a 340 pie-plate on the aircleaner housing, and go hide in the beer-garden.
Building engines is like religion; Everybody is free to believe whatever, and everybody has an opinion on the truth . But the truth they seek is their own truth, not absolute truth. So, the trip thru life is tripy. Do whatever you want and whatever happens, happens. Just don't be crying when it doesn't turn out how you expected it to.....
BTW;
don't forget about the time factor. How long will it take to;
> get custom pistons made,
> to set the compression ratio,
> to get a custom cam ground,
> to get custom pushrods,
> find decent headgaskets.
> all the mock-ups, tear-downs, and re-cleaning.
> schedule the various machining operations
> etcetera
> what if the project drags on for months or years, not weeks . And then, when she is finally installed, you still have to put a trans behind it, and tune it.

Do I have a better idea?
IDK, but I think so; leave the 273+whatever/cleaned up, and super/turbo charge it, BOTH! now that would be truly unique, and everybody will drool all over it, all the time.
Jus saying; supercharging is the great equalizer, and not very many do it cuz it's pricey. But you seem not to be overly concerned about money..... ,it should be a great fit for you;
1) unique
2) pricey
3) attention-getting
4) performance-oriented
5) car-show killer