I had a similar issue with a 350 install. I modified the original radiator support (measure/cut/weld/remeasure/re-cut/re-weld) to allow me to lower the radiator. My issue was more related to making clearance for the fan blade and auto-transmission/radiator coolant lines, but also put the fan in the right place.
Carl


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission