Fan Clutch ID help

Thanks for the reply.
The diameter of the 3462106 is 7 1/4".
It DID come off my 318 72 Dart Swinger.
I bought the deeper Hayden 2747 based on Summit's narrow down of choices menu for the Swinger and it fits that car fine although it's deeper than the original..
My mate's 383 Belvedere is a lot tighter for space though.