All Small Six Mount fan to pully w/o spacer?

This relates to all small sixes
Sorry for what might be an elementary question.

I did research on spacers but seems most are adding space between rad and fan to accommodate shroud - makes sense.

I have the opposite issue - very little space between fan and new rad (new rad thicker than old).

I removed factory spacer (way too long) and tried a .5 inch but still uncomfortably close to rad.

Can I just run the fan without a spacer? I don't see why not, it's clear of pully, hoses, alternator but wanted to check.

(Yes, I dont known why the PO ran the 2 belt pully. Not helping.)

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If not using a shroud the fan needs to be 3/4 to 1 inch away from the radiator. This makes sure that the fan is pulling maximum air through and not pulling it from the sides. If using a shroud that changes fan position.
 
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