Which Tranny do I have???

If its a slant it has to be the 904. They didn't make the 727 for the slant 6. There is a way to tell just by the pan on the small blocks though the 727 pan has an extra jog out in the corner. It is hard to explain in words but very easy to identify if you can see the two side by side. Hopefully someone will have pics to post of the two for you and you will see what I mean. Hope this helps
Justin