I know this thread is kind of old but just did my swap from a np203 to np205. Was able to use the same cross member. Driveshaft lengths were about 6” difference. Front had to be shortened and rear lengthened. Mine were approximately 26.5” for the front and 66” for the rear. I found a np205 with 27 spline and adaptor and fixed yoke, so didn’t have to mess with that. I am under a time crunch so didn’t want to source the driveshafts, so a shop shortened the front and made a complete new rear driveshaft. I believe the front driveshaft out of a manual 4x4 would work. If anyone has any questions let me know.