Big block cooling issues

I think for me to be able to run a shroud, I'm going to have to cut up my radiator support. With the radiator pushed all the way forwards, I have about 2" from the radiator to the water pump pulley bolts. The shroud/fan assembly that I am looking at is 4.5" thick! The only way that would fit is if I heavily modified my radiator support or removed my water pump and went with a electric pump mounted somewhere else.
Here's what I'm considering
Derale High-Output Dual RAD Fan and Shroud Kits 16830
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