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

Right on! The 360 in my Dart is a stock short block with 0.060" H116CP pistons, stock small valve "587" heads, Comp 268AH10, LD340 intake, StreetDemon 750, and 340 HP manifolds.

It currently runs low 13s in the 1/4, spins to 6000rpm, idles like a kitten, and has been trouble free for 3yrs now. Hell, last year at a cruise in they had a burnout contest. I held it in 3rd gear at 6000rpm for nearly 20seconds, tire speed was over 90mph. Not to mention, all my buddy's with 340s and 318s are always blown away with how stock the build is and how fast it runs. At nearly 371 cubes, there is just a big torque advantage!