1961 to 1963 slant six 904 trans swap

[Wallus57]

Anyone know if the 61 904 trans will work in a 63? Both are slant six. I haven't looked under the 61 yet, but I think it will have a park brake on the back. Can I just unbolt that and carry on?
Thanks for any help, Wally

 

[R413]

If it has a park brake on the back then the output shaft and tail housing are different.