Hemi 4 Speed?

I picked up 2 4 speeds this weekend, both belonged to a guy that raced a hemicuda. One of them # C955564Z has a tailshaft # C99539SS, the speedo has a freeze plug and i'm told the sycronizers are cut for crash shifting. Is this an original hemicuda trans? The other trans has the same gear section but different tailsection. I am building an old school hotrod with an early hemi and need just one trans.
I feel that if i have a 'historically significant' transmission i should know about it so that i can get it into the hands of somebody that needs it, no i am not going to jack the price up-thats not my style. Thanks, oj