So I am at the boneyard today and picked up a clutch fan off a 1982 6.2 diesel because it was a monster 7 blade job, didn't think much about it until I got home and noticed that it has the larger big block mounting pattern. I have a 1990 with full serpinteen (sp?) belt setup with the smaller mounting pattern, oh crap says me, then I think, maybe I can just get a different clutch and still use the large 7 blade factory fan, then I notice that the clutch mounts to the fan with a 6 bolt pattern deal. It has been a few years since I ran the stock fan clutch, but thought the 350 version clutch mounts to the fan with 4 bolts, oh crap again. Is there a fan clutch application that mounts the clutch to the fan with a 6 bolt pattern and then mounts the clutch to the water pump with the smaller 4 bolt small block pattern?