In need of an education..340 vs 360.

Joes68340s I think the question should be how much HP is needed to power an average weight an A-Body to 11 seconds from the argument were getting here bigger engines need less power to do it over smaller ones. Which I'm pretty sure is wrong? Think of engine size as a powerband selector say you want 400hp a 273 gonna be at around 6800rpms and 340 gonna be 5800rpms and 408 gonna be like 4800rpm, now 273 gonna make less torque than the 408 but if geared proper the torque to the ground is gonna be about the same through gear multiplication but if everyone ran 3.55:1 the 408 gonna walk away from the other two.