451 overheating, even when moving

I can slide a piece of paper between the efan "bracket" and the rad, top to bottom, however at the top of the rad the fan is a bit more than 3/4" at the bottom of the rad it squeezes down to 1/2" clearance....

Bezos and co have 1.5" spacer, used, for 10 bucks so I ordered it right after taking that bottom measurement. Should be here tomorrow and I know I have plenty of 5/16 course bolts that are less than 2" so I should be able to get it on by Sunday evening