Most likely I will have to customize the driveshaft, but for now, I would like to buy the big components of the drivetrain, and I don't want to make more mistakes.
I'm also contemplating of using a whole NC rear sub frame, with diff and the whole setup. I was trying to avoid this, but I have read somewhere that I wouldn't save much weight by avoiding the factory sub frame. Also the NC rear suspension is much more complicated, to replicate all that by myself.
Ideally, I would like to use the NC diff and NA/NB rear uprights, but I don't know if the NC half shaft would fit to the NA/NB uprights. I would like to stay away from to much customization, for the future to be easier to service the car.
Here is a link to somebody, who did a build with the NC rear end:
http://www.locost.ozcarnut.com/index.html