the input and mainshaft are independent of each other. look a few pages back and you'll see the pics i posted of the 231/241 swap nonsense i did. the planetary separates them. If i was able to do it, you shouldn't have any problems figuring it out.
http://www.tamor.org/forums/showpost...postcount=1278
you'll have to take both cases all the way apart. once you tear one apart, it becomes self explanatory, relatively simple design.
did ford ever use anything beside 31 spline?
Ford NP208 for $50 in spring:
http://houston.craigslist.org/pts/1684171450.html