i did this swap to my 95 in dec. as far as brakes go, it is not a drastic improvement, but with 31's mine stops just as good, if not a little bit better than stock. new hard lines are cheap, fit as perfect as you wish, and are simple to do.you would test fit the rear end on the truck, use, some wire to route both mock-lines, then measure it. take an old 8.8 line to the local parts store, then get the next longer length of that size pre flared for each side. the driveshaft ujoint will scrub the muffler, but i put a bolt in the old frame/swaybar hole and wired it to the hanger bracket to pull it over. works flawlessly. also, try to find a recently wrecked exploder-the rotor will not be corroded to the point where they have to be turned; or get new ones-they are as cheap as getting them turned.
i haven't really seen this covered here, but if you feel comfortable replacing a head gasket and desire a locker, you CAN install your own locker. the shims in the 8.8 carrier are DIFFERENT than dana stuff, you can reuse the old ones with its stock gear ratio, and don't have to pull bearings and rebuild the assembly 10x to check the backlash,pattern, etc. this is the best thing yet ive done to mine. for about $1100 i got better brakes, 4.10 gears, beefy(er) axles, and an eaton elocker, and oh yeah, i did it myself.