I have a 2 door 96 XJ body with the engine bottom from a 97 XJ and the head from a 94 grand cherokee. Everything seemed to be working fine until the water pump went out on the freeway and by the time I noticed it over heating it was at 302 degrees F and started to loose power fast. I cut it off and coated to the side and with the help of some strangers got it off the freeway to safely in a parking lot then AAA got her home to assses the damages. what i found was #2 piston melted a hole down one side. besides a lot of burnt up oil baked on everything, all else seems to be ok. My 94 short block had #1 piston skirt and connecting rod break down and blew a hole out the side of the block and the pan but I still have the everything else which is why I used the head on the cheep 97 short block I got off of craigslist. My question is can I use a good piston from my 94 grand cherokee in my 97 XJ short block?

 

Probably swappable, not a great idea. If ya gotta do it, go for it. I've done it before, sometimes ok, sometimes not so good. Run a glaze breaker hone in the hole a little, get the rings a surface to seat on. Good luck! R