engine swap

hi guys, i am looking to swap in a 4.3 vortec in place of a standard 4.3 vin z motor. has anyone done this. it is a 4.3 out of a 93 blazer. into a 93 k1500 4x4. i am wondering if the computer and wiring harness should be a straight swap or are there any problems that i should be concerned about. any help is appreciated. thanks, toivo