18" fan with clutch for a/c car

I have a 73 duster 340 With AC but does not have clutch fan (Fan / spacer / pulley).
Trying to figure If the my car should have has a clutch fan set up?
This will fit an abody mopar. If you are looking for restoration exact parts I don't really know. I had it in myn72 Demon and decided to go with an electric unit as my car has a 500 HP 416 stroker motor. Hope that helps...