electric cooling fan

[lmdangerous]

I am looking at a electric cooling fan for my 51. I have just replaced the radiator with a 3 row aluminum. Bolts in perfect , looks great.
However the mechanical fan is to close. Less than a 1/2 inch of clearence. I have looked at several nice 16 inch electric fans . None of them will clear as a puller ( need at least 3 1/2 inches of clearence on the inside between water pump and the radiator).
Has any one successfully used an after market fan on the front side ( got plenty of room there ) . I also am concerned that a front mount, blow-through fan will obstruct the flow of air through the radiator going down the road. I had rather not relocate the radiator - it does look really good in there.
Thanks LMD.