367 vs 410 Engines Masters

625hp/410ci = 1.52 hp/ci
625hp/367ci = 1.70 hp/ci

My side of the argument is based on years of engine building and dyno testing……..and that experience has shown me it’s not all that hard to make 1.52hp/ci, but it’s def not as easy to take the same parts that got you to that point, and now make 1.7hp/ci.
And that doing nothing to the combo except reducing the displacement doesn’t usually bridge that gap in efficiency.