I have swapped from g56 to a nv5600 and you need a starter spacer and will beed to remove the flywheel spacer infront of the flywheel if you have an aftermarket clutch already, then the tranny mount will need to be modified cause the length difference, but with the nv5600 it will fit wight where the g56 mounts are, the front a rear driveshafts will need to be shortened/ longer in front, other than that just get the correct hydraulics that connect to your firewall