Transmission leak
 

I have an oil leak on my 66, I pulled the transmission to to check the front oil seal. Is it posable that the shaft that is below the clutch shaft is leaking?

The cluster shaft bore commonly leaks once it is worn out of round. You may see a oil path from it. Check to make sure the case isn't cracked. Also if those look ok then I would pull the bearing retainer, the bolts should be sealed and the gland nut may be chewed up from a pipe wrench or on backwards- if it was ever apart.

Some Chevelle forum information on the subject

https://www.chevelles.com/threads/mu...l-leak.239152/