Clutch Fan Info

I looked at pics of installed clutch fans. It appears that due to the angle of the fan blades the blades may go past the top of the clutch, , Im thinking I have to call manufacturers to get a fan that doesn't extend past the top of the clutch that's selected
Granted I’ve not seen everything but I’m not sure that I’ve ever seen a stock fan blade that would stick out further than the face of the clutch fan.