Yami,
I don't blame you. Not the most inspiring drive to Norge from where you are. I did it the other way around.
As for Fork dimensions. The TDM's are about 840mm installed, the Ten's are about 960 uninstalled. But the XT axle is is about 70mm up from the base, the TDM's are right at the base. Should be about right but with a lot more suspension travel. And better quality forks. There is only one way to find out.
Saw a few clips on the Tube about somebody installing a 900 engine in an XTZ chassis. He seemed very pleased with it. So, good luck with that.

Rob