Why are 318's low HP and torque?

Okay gotcha!

Any verdict on my heads? Are they 302's? 434646, e18, HN

Okay so I found out that my heads are from a 318 5.2 Liter engine from the years of '85-'89.. It said the engine had flat tappets...? What is that?

I'm trying to research the heads but not much information is coming up. I'm not sure what to make of these heads....