Ok. I have a 7 blade clutch fan on my M body and have for years. I understand where you are coming from Andrewh but I think I'm in touch of enough with my car to notice if the clutch is going out. I'm replacing the rad in in Power Wagon and I'm going to replace the crappy fan and clutch at same time while everything is out. Time to head over to online swap-meet to see if I can find a fan for sale. Thank you.