Thanks LGriffin and Gearhead for the replys.
I know that the internals of the two trannies are different I just thought I would ask. I know it is the case that is leaking maybe I will look at having it welded as an option. The only way I will know for sure is when I tear the overdrive tranny apart I will take the rear section off the other tranny and check if it may be possible. As I am writing this I just remembered that I have a overdrive section that has the same tailshaft spline count that is the same as the saganaw. I was able to pick up a real good saganaw tranny for 20 dollars and one for 40 dollars at the last swap meet. I guess with all the other options out there now the three speed is not the tranny of choice. If I learn any positive results I wiil post what I learn.
Thanks Steve