Fan Clutch ID help

Trying to sort a fan clutch for a mate's 383 1964 Belvedere.
We have here a new Hayden 2747 clutch which is too thick at 3 3/8"

We also have a stuffed genuine chrysler pn 3462105 which fits fine at 2 1/2" thick.The brand name on it is Eaton.

Can someone please tell me what this part no 3462105 fits so we can order another one?

Alternatively an aftermarket part no. that is 2 1/2" thick?