What is the correct fan to radiator clearance?

jawbone said
Thanks for the response and information. Do you know how these numbers compare to the 2947. Wanting to know how much I will gain by using the 2747 fan clutch.

My typo. That is 2947, see photo.
edit Let me see if I can check the numbers too.
2947 also requries the reducer bushing- which does not fit snug.
https://www.forabodiesonly.com/mopar/threads/fan-clutch-bushing-question.454985/#post-1972846063