4.7 dakota to 5.7

Joe Dokes said
It's been done. I think it requires some fabrication.

You can read this guys thread over here:

http://www.dodgetalk.com/forums/showthread.php?t=143795

Hope this helps,

Regards,

Joe Dokes

That is a gen 3 Dakota, he has a gen 4. I dont know firsthand, but I have read at Dakota-Durango.com that the hemi is too wide for the gen 4.

That forum has a whole section dedicated to the hemi swap and would be a good place to start.