Plastic fan cracks and fan clutch replacement

[DaveR]

So my original metal fan and clutch aren't decoupling.  Nothing new to me, since I got the car on the road last year it has never worked. Since I can't get a fan clutch for the metal fan (and because its dangerous) I will replace it with plastic fan and new clutch to match.  

I have some plastic fans from a friend, but I've read a bit about them cracking and inspected mine.  These black lines are cracks, although in some places they line up with the molding lines of the fan. Can get a small screwdriver down into them. No bueno.

Guess I won't be using this 8 blade version.   The 7 blade one I have looks better, so I'll go that route. Or just buy a new one, but they aren't cheap.

As for the fan clutches, I am figuring out which version to buy. I've read Aisin makes decent ones and is the OEM supplier for some makes. For whatever reason the compatibility chart for it (AISIN FCN001) seems to only show the 71 240, 260Z's and the 280z all years. I would imagine this should work on any of the plastic fans right?  The 7 blade and the 8 blade both seemed to fit the hole pattern of the old plastic fan clutch I have lying around.

seen here and other places (rock auto) https://www.amazon.com/Aisin-FCN-001-Engine-Cooling-Clutch/dp/compatibility-chart/B008EEYJ2O

Is a suitable OEM clutch still available?  I tried to figure out the Nissan part number but got a bit confused with all the different years, even though they all seem compatible with each other from 240 to 280z's.

Edited May 15, 2017 by DaveR