Jim. Went an took some pics, I have more than 2" between the fan and radiator. Again 77 2f, 2F fan clutch, and the fan is a 7 blade. There is a different fan on some other year, I want to say a 74 fan is different, not sure however.
pics...
yep I got a 77 2f in a 67 fj45. I'm running a 2F fan clutch and plastic fan(forget how many blades, there are a few different fans blade types) but the fan is a good distance away from the radiator. I'll take some pics tonight and stare at a bit. I might be the water pump that is putting it too...