63 Dart 904 with rear pump thrust washer question

I had one other thought on this.
Take the output shaft out and measure how deep into the governor support the oil holes are and then mark that on the outside of the governor support with a marker.
Then line the governor inner assy with the sealing rings on it next to the governor support and see how deep it is supposed to ride inside the support.

The thinking on this is to try and determine where the inner part with the rings on it normally rides.
You might be able to tell by the marks the sealing rings left inside there also.
This might tell you just how much end play the output shaft might have with the rest off the clutches and drums in it.
The stuff forward of the front planetary set might hold all the rear assy back against the rear planetary when it is all together. (and this may prove that theory)

Does this make any sense?, or do I need to try and find a better way to explain what I am thinking? :-)

I'm sorry but other than this I think we are out of suggestions, but you might get ahold of this guy and see if he has a parts breakdown or manual on it.
http://www.1962to1965mopar.ornocar.com/welcome.html

His name is Gary Hamel and his email address is [email protected]

Again, I wish we could have had more definite information for you.
Give a yell if I can help you with anything else in there and I will give it a go.