Awsome I am glad to see your finaly making some progress!
You know AMG fits that engine into the Zonda, I wonder what kind of electronics they use to make it work? Maybe you can get in touch with the guy who put it into a 560SEC. He probably had some similer problems. I agree that the most challanging part is going to be getting it to run and shift like it should.
Good luck, when its done if you take me for a ride I'll buy you lunch!