Approved vehicle

[2mas]

I have this crazy idea of putting a Duramax engine into my truck. I have the donor (ambulance Savanna). Im more likely to re-use the Savanna chassi than putting the motor in a c10 frame.

Here is my question for you. How do I get this vehicle approved? Is there any inspection that should be done. The thing is that I want it approved and "diesel" written on the title or some other document in order to bring it to Sweden in 2 years as a "home moving vehicle". Registration on these type of moved vehicles are easy if approved in US. I will live in Boston, MA starting this August.

/Thomas