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

no no...not peak at 1500 - 2000.But you need a useable number at lo rpm.
Member prh has offered his dyno sheets with his warm 318 with a cam and head porting in post #72. Compare them to Toolmanmikes' factory 318 torque numbers.

Oops..i was typing when your post came in and i missed it...