For the rears, assuming everything is in a mess, I'd go ahead and buy new shoes, springs and adjusters - the whole kit doesn't really add up to that much. Usually the springs come as one kit and the adjusters as another. Make sure one or the other kit has the little cables for the adjusters, which can also be gotten separately. And then I'd buy two new wheel cylinders, which cost only a couple bucks more than the rebuild kit anyway and guarantee good bleeders. You'll have to judge the drums for yourself. REmember if you haven't done this before to take only one side apart so that you can use the other for reference. There are a lot of "which way around does that spring go" kind of issues here. I'm usually a cheapskate on drums, but of course if you want to do it really right, you might want to pop for those too, or at least have them turned, and have brand-new brakes all the way. The more you replace now the less likely you will be to have to write a new copy of the familiar "My left rear brake grabs when it's wet" post. From there, it's a matter of whether the lines are good and whether you can get them disconnected. Basically on a rusty XJ you need first to see if you can disconnect the axle lines from the wheel cylinders. If so, then you're fine. If not, you may need to replace them, and then it comes to whether you can get them off the tee on the axle. If so you're fine unless the hose is shot. If not....etc. etc. all the way up to the front. It's more nuisance than money for this stuff. It's hard to find the exact right lengths, but you can do it adequately with stock tubing. The more you replace the better the system will be when you're done, and if you've got a lift, now is a really good time. And if you haven't already, go out and buy a GOOD (not Walmart, not even Sears, but Snapon or K-D) flare nut wrench for those fittings. 7/16 and 3/8. You will not regret it.