I will see if they have the spline count listed in the OD manuals that I have. This is the only pic that I have that gives an idea of the bolt pattern on the OD unit. It is a 6 bolt round flange, just not sure about hole/diameter measurements. In this application the c6 adapter would not be used. Too bad all the good pics in the manuals didn't scan well enough to see.
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I see where you are going now.
You want to attempt to use od direct on tcase flamge.
Take unit to wtecker see if lines up...any 4wd ford trams will do to test fit for our trucks and the transmissions that came with them.
Now we are speaking same language....see how that picture would have made your post clear to begine with..