You can use any 23 spline (fine spline clutch) from the 1960s and newer. The current one you have is a course spline that was from the 1950s and older. I would use
the biggest clutch your pressure plate will take. The last one we put in was for a 1966 dodge cornet rt clutch (10 ½”) and it came with a pressure plate as the one that was in the car was in rough condition. It came from napa and was listed as a clutch pack although there are lots of great and inexpensive options available. If your current pressure plate is
in decent shape then likely a 10 1/2" clutch will work fine and they are readily available from all the major part suppliers.
I really dont know the width of a jeep cherokee. Here is a handy chart for a lot of the cars which gives you the widths and that is the key for you is making sure you have
the track width close. Having the spring widths the same is also a nice thing as it saves more work. In terms of drive shaft its just a case of having the yoke with
the finer spline for the transmission and the rear end. So measure your spring widths and your track width and compare them to the jeep. Personally I prefer going to
a car version and depending on what your doing engine wise, likely around the 3:55 or 3:73 ratio. One of the mistakes guys do is going to something 3:23 or 2:73 and
you suddenly have a dog at lower speeds. So unless your really building a performance engine 3:55 would be as low a number as I would suggest.
Hope that helps get you rolling.