I am sure that it would bolt in, but the question would be the ECM, such as it is.

Try to contact some of the guys at Potomac. If you will do a search here on Potomac you can probably come up with their contact info. They are a large MB salvage yard, and there is at least one guy there who has put together some cars like you are talking about. Someone there would know just what pieces you would have to bring from the donor car to make the 3.0 run right.

Good luck with it and keep us posted on progress.