The Cherokee has a 5x4 1/2" wheel bolt circle, similar to common "small _Ford" bolt pattern.
You might want to think about a rear axle out of an Explorer 4wd or maybe a Crown Victoria, etc if keeping the bolt patterns matching is important to you.
Not sure about the width issue, you might want to take a "tape measure trip" to your local boneyard.
Regards,
Wannabe
