97 SS axle into 95 Z

Any forseeable problems with me installing my new 30k mile 97SS 3.42 axle into my 95Z currently with a 2.73 axle?

I know i have to get the pcm redone, but any other forseeable problems that i might run into?

If one is a 3-sensor ABS only car, and the other is a 4-sensor ABS + TCS car, you will have different brake line configuration, and the sensors will not interface correctly. If they are both the same, no problem.