Dick, not sure if this will help or not, but I just had to replace the fan clutch on my '63 Electra and posted a similar question on the BCA Post War Tech forum a while ago. Someone posted a part number which I took to NAPA and they cross referenced it to one they had in stock. Now the Electra is of course a 401, but the fan clutch may be the same or they may be able to use the part number to find one that fits the 364. Here is a link to the thread.
>>>> Fan Clutch<<<<<
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Tom Liddy, BCA # 33837
'59 Invicta 2dr Hardtop w/factory air
'59 Electra 225 Convertible
'63 Electra 225 Sport Coupe
'05 Rendezvous