Basically if you want the powerband to be static (no real rpm increase) idle-4500/5000+ rpms the only main NA way to increase power is increasing tq by increasing displacement. Plus a 440 with 2.94 gears will put similar tq to the ground as 360 with 3.55, or a 360 with 2.94 would be like 298 cid with 3.55.