Why are 318's low HP and torque?

To answer the title question of this thread....they're not!!!! A Chevy 327 2 barrel of the same Era was rated at 210 hp. and 320 lb./ft. Torque. A 302-2 Ford...220 hp. 300 tq. A 351 Windsor..only 250 horse. A 68 teen was rated at 230 horse, 340 tq.