I'm gonna go the other way, and disagree with Mr.Streets here....

400 ci motors can ROCK when built. And dispite common belief that they run hotter- if they are build right, they really don't.

Torque of a big block- weight of a small block. Thats the exact reason Bill Mitchel/World products came out with their own Motown small block castings.. More cubes in a smaller lighterweight package.

I don't have a bunch of numbers to back me up on it- but there is a good reason why all the circle track racers snatch up all the 400sb's they can find.