Fan clutch 2863233

[roadrunner57]

Can anyone tell me what this is for? Also the date? I think it came off of a 72 duster 340.

thanks in advance!!!

 

[Syleng1]

Clutch for the fan- allows engine to “slip” the fan on hard accel but lock up at higher rpm for cooling. It was typically a low end rpm power saver and a fuel economy thing.