I have tried to search for this and have not come up with a definite answer. What I am looking at is a 96 ZJ booster into my 89 XJ. The problem I am having is that the part numbers off of the ZJ booster is 52008646 and the numbers off of the rod are 19901. The numbers of a 96 XJ booster that will bolt right in are 52008647 and the rod number 19902. As you can see the numbers are only off by one number. They look identical but I don’t have the ZJ booster in my hands to do any measurements or verify that they are identical, so I was wondering if anybody has done this swap and it works, or if I should pass this up and look for a booster from a 96 XJ to swap in.