The NV5600 and G56 6 speeds have the bellhousing integrated onto them making them only able to bolt up to a cummins or v-10. So they would be out of the question for a swap. A NV4500 would be your best choice. I think you would have no issues with one behind a 440.

392 gen III hemi on E-85 727 trans Dana 60
10.02@134