You will also need adjustable upper control arms for the rear axle in order to point the pinion upward at the transfer case output.
Consider buying a used TJ or XJ front driveshaft, then have it shortened and balanced for use in the rear. Good affordable alternative to buying new.
The super short SYE is a good option for a little more money, will add to the rear driveshaft length. It's got an inductive pickup for the speed sensor so you will need a speedo calibrator like that offered by Dakota Digital for $80 if you want to adjust the speedo. I run one so I can easily adjust the speedo for different size tires.