318 poly heads?

This is probably a stupid question, but would a 318 poly engine head fit on a 318 LA engine, and if so would it be worth it, i dont know really that much about the LA engine heads but i always hear about how the hemi or poly-spherical heads are very efficient, but was it just for that time, or were they still really good, just more expensive to produce or what.

i ask because someone is selling a 318 poly near me for $150, and I have never really worked on an engine, let alone have the equipment to pull a motor, but heads seem like theyd be a pain, but able to do in the car still.