Tony,
This isn't going to cheer you up much but I called a man that works in the local Ford parts department and he told me that they would either need the numbers off the transmission or you just have to pull the tail shaft and count the teeth. He aslo told me they used a 7,8,& 9 tooth gear on those years transmissions. So to double check I called the man I know at one of our top local transmission shops who rebuilt the C-4 in my 65 Comet and is really good and he told me exactly the same thing. Either take the numbers to Ford, or pull the tailshaft and count the teeth. I didn't even know they used a 9 tooth gear so now I have learnd something new from your post.
Ron
