hey bill

On my 78 300D, i'm not to sure on how many blades i have on my fan. But i do know that the fan is metal and thats what came stock with the car back when my dad bought it. Is there someway that i can test to see if my fan has a clutch in it? The only info that i can give without dissmantling it is that when the engine is off and the belts aint going...i can turn the fan manualy with my hands...when i spin it...it only goes about 1/4 of a rotation.

thanks
Allan