Why are 318's low HP and torque?

Ugh! I know you guys are right. Plus I have a running slant six car right now which makes me more prone to making this project long and drawn out. But I really do want this small block in my car ASAP! I'm going to get off my *** and get her done. FYI this is my only mopar, my only project car, my one and only a body. i am trying to get a lot out of this lil car in place of my dream of having many! Some day......