I hope you dont think that just mechanically fabricating whatever, and have AWD will work. The AWD is not mechanical 50/50 split as you may think. A GTR is RWD until the attesa system senses slipping then shoots power to the front wheels. This is x 4, meaning if it senses the back right tire spinning it sends the extra power until it stops spinning to the other three with in milliseconds. I dont know if you have seen attesa system wiring but it has its own ecu and the harness is twice as big as the engine harness. Then when all said and done you have to have sensors for the attesa system which are like ABS sensors on all 4 corners. Not to mention matching the gear ratios between the two diffs. Anyways, get a turbo kit or something, stop dreaming. Dont waste your time, I dont know why I did, typing this.