Room for a Clutch-Fan in a '65?

I just upgraded the lil barracuda to a 4-Bbl, and of course I want jus' a little more.
Do I have room for a Clutch-Fan in here?
I swapped a 2 inch Fan Spacer for a 1 inch Spacer when I put the Chinesium Radiator in a couple years ago.
I have a Fixed Steel Fan in there. Is that Robbing some of my available power?
Should I just Leave it be? or is the Clutch an Option for this?

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The answer to your question, Not much. May be 1/2" at most. The clutch is the key. There is a thin one listed around here somewhere. You may have to search and read.