i got a 1996 cherokee with 4.0 , i pulled a 4.0 out of a 1997 grand cherokee to put in the 96, i am not much of a mechanic but none of the electrical connections match, so, do i need a 97 cherokee wiring from the fire wall to match the motor, or do i need 96 cherokee wiring to match the jeep it is going into? or do i need something else? or will this even work? any help appreciated