72 Dart Hemi swap

Pretty sure a 200R4 can be made to work without much surgery. I think still some but the smallest I know of outside of an A833OD swap.

I haven't read the thread but maybe this would a useful read? 200R4 vs A518 vs Keisler A41 fitment

Or maybe this one? Any companies selling complete small block overdrive transmission assembles?

Even the GV needs an bump out in the driveshaft tunnel.