okay. I never made an adapter plate. I need to call a specialist for that.

But the 8hp70 has a built in starter generator. Such a starter generator may be modified to act also as an adapter.
I think I have to call some people I know.
If you guys are interested I can write here, what they said.

I know that such a transmission is not really the part to put in an old, cool and original mopar. But I find it quite interesting.
It would bring out the best of the original 400.
With the new heads, pistons and cam (and modification to the subframe and such) it would be really fun to drive.

I would have to import a new rear wheel gear ratio, a new converter and such. with the shipment cost, I could buy just a transmission here in germany. And I have an expert right on my side to help me.