i am planning on revamping the 4.0 in my jeep. i am looking at a nv4500 with a pto from a 2wd chevy. i wam curious about what the differences in the 2wd version and 4wd versions are? i am planning on using a np241 out of a 94 chevy z71. what will i have to do to make this swap? will it bolt up or will i have to change the transfercase input?