Do you not have the pulley that was on the engine previously? If it worked then, it'll work now. It doesn't care what type of fan you use.
Assemble the fan to the clutch, then install that along with the pulley now. This is the final installation, so get everything tight. Install and tenion the belts--same deal, you shouldn't need to mess with them again. This is all easier to do with the shroud and radiator out. You've got more room to work, so button up the front of the engine now.
When the radiator gets back put the shroud around the fan, up against the engine. Let it rest on the fan blade. The radiator should have slots rather than holes for the lower bolts, allowing you to pre-install the bolts just loose enough to allow the thickness of the radiator bracket. Slide the radiator onto the lower bolts, install the upper bolts, and tighten all four. At that point, you just pull the shroud forward and fasten it to the radiator.
Trying to install the fan with the shroud installed is an enormous pain in the ass. Save yourself the frustration.