I've seen A LOT of posts about making HP with a 318-So why is it so ???

I have a number of cars, the 2 I drive MOST are the 71 sweptline, it has a bone stock 5.9 magnum with a carburetor, and the 71 dart which has a 5.2 magnum with a carburetor, both with 3:23 gears, jump in and drive across country in either one. Big HP is fun, but seldom used!