I had mine about that close. I was trying to bump it up an obstacle and when I slid back, the rear diff hit a rock and the momentum flexed the radiator back into the blade and opened up a nice circle in it.What is the minimum suggested space. Most of my searching was fan blades too far away.
I have about 3/8" between the plastic factory toyota fan blade and the radiator. Too close and asking for trouble?
I'd like it to be around double what you have to be comfy.