incomplete 833 help?

well, that is part of my problem...I don't have the front bearing retainer so I am wanting to start with the ID of the year of the tranny. I will count the splines of the input shaft tomorrow and that might push me in a direction. I also need to find a better more readable exploded view of the tranny that can give me a little direction to figure out which gear is which...

also, I am running a 904 right now will the slip yoke work on this tranny? if not is there a parts house I can get this stuff from?