From what I recall, the seal kits are either hard to find or incomplete for 89 due to the different size output shaft and subsequently also a different pitman arm vs. 90 & 91.

Having found myslef needing the seals also about 3 years ago, I had to buy the seal from a bearing & seal shop and had to buy them in bulk, so I have bags of the outer pitman shaft seal and the inner seals often called "U-packings".

Will have to dig them out of storage. It's a bit of a messy process and time consuming. They will be to make sure your output shaft is smooth and not corroded from salt and regular 2 decades of exposure, otherwise it'll just tear up a new seal. Mine was fairly clean, but I also took the extra precaution of coating the output shaft with an epoxy coating of some sort (Eastwood perhaps?) just on the smooth shaft part where it interfaces with the output shaft seal. Additionally after installation and before putting the pitman arm on, I packed in a bunch of bearing grease over the seal then put the pitman arm over it to help keep the seal 'moist' and prevent it from cracking and drying out like the previous seal had done. 2 years later and I havent had any leaks.

Jim