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Carl, that's the trans pattern style of a Dodge A833 IIR. I have read some info about that trans (A833) having a longer input shaft not suitable for GM.
I found a couple of pictures on-line between the different mounting patterns. The first is a GM case for the MY6. Second is the older style.
Remember the A833 Hemi style was not an OD and the levers would be like your pictured showed. When they turned it into an OD transmission that gear is in the 3rd gear position so the lever has to be turned upside down