And then there's the Argentinian '906' big Slant-6 block (3.6" factory), which at stock bore and with stock 225 stroke of 4.125" will get you a 252 cubic inch engine. Bore that block to 3.66" and you're a bit over 260 cubes.
Me, I've always thought it would be fun to arrange bores and strokes so as to arrive at 273 cubic inches, then build it up with a 4-barrel, finned aluminum valve cover painted crackle-black with the fins polished, etc, and dress it up with readily-available 273 Commando decals to mess with people.
But saying "It's a 252" and letting 'em wear themselves out knowitallsplaining how it's really a 225 and then showing the receipts could be fun, too.