Will it be possible to maintain the TOD or would this require a manual transfer case? I know the TOD has it's own computer but I have no idea how this interacts with the ECU. I think this would be a really cool swap and if not too complicated provide a good alternative to our standard power plants as they get older and older.

I my opinion the emissions standard should simply be: does the vehicle pass the individual output tests period. My guess based on, well nothing, would be that this would achieve a more efficient power plant solution resulting in lower emissions.