22 champion radiator and champion 16 inch single fan question

Bought a 22 inch Champion radiator and the 16 inch single fan from champion as well. My problem is the radiator (CC526) fit with elongating three holes and drilling a forth finally fit. Only to discover the fan assembly with the shroud will not clear the water pump pulley by about an inch. Has anyone ran into this problem before. The fan and shroud is about 3.75 inch thick. The space between the pulley and rad is 2.75 in. What do I do now?