Ken,
Did you find the info you needed? I rebuilt mine from my D618 last year and worked through Mac Van Pelt to get parts. http://www.vanpeltsales.com/ Input and output shafts are unique, but cluster gear, Low/rev, bearings and thrust washers etc. were same as early Ford V8.
Rebuild was pretty straight forward and car shifts good now. Old Gears were really beat up so I had to replace the cluster gear, low reverse gear and synchro sleeve. I also had the clutch rebuilt at Fort Wayne Clutch and replaced the rear main seal which was seeping.
Matt