Need advice on a car I’m looking at

There are a couple FSJ specific forums. fsjnetwork.com and ifsja.com I've had a few of these over the years (I prefer the earlier Kaiser era with the Buick engine, but nothing wrong with the AMC powerplants) Being an 89 you have an AMC 360, 727Torqueflite, and most likely an NP229 transfer case. This was the final form, mechanically they didn't change much after 79, and 91 was the last year.