Then spin the 632 to 15k, now who's winning again? This is why this argument is circular. The 'common wisdom' is correct - bigger wins every time, but you keep throwing imaginary crutches at the 'bigger' motor.
Yes obviously if we take things to the limit max piston speed same level of bottom end parts a 273 can't turn enough to make more than even a 318 since both would have the same rpm capability. Ultimately piston size limiting factor so with stock blocks 400/440 have max bore capability, If you bored a 400/440 to 4.375" and no matter what crank you use 3.38" 3.75" 3.915" 4.15" 4.25" etc.. Taking it to max piston speed they all dispace the same amount of air, same theoretical capability of hp, so my question that I was trying to get at and finally figured out why can't the 3.38 spin up to make same hp as the 4.25, what's hindering it ?