good point! forgot to mention having a build thread. original post edited.
essentially the point of MJotM is to highlight members of CC more-so than trucks.
The link in my sig has a thread about the 90s Dakota bench installation. way better than any MJ bench ever was! at the very least, don't buy any bench that doesn't have headrests. Early MJ benches didn't have them for some reason.
try car-part.com and search for various items for your year MJ or an XJ. the website organizes by part number so it should then find late 80s Jeeps for you and you can then go to them and see if the harness is available and acceptable.
or pullapart.com lists the cars in their various yards.
keep in mind that 2wds are 1" lower than 4wds from the factory so a 2" coil spring will lift a 2wd truck 3".
If you're happy with the factory ride quality, why not get some lift pucks?
no harm in replacing the hoses along with the antifreeze just for piece of mind. Brake parts are another concern after lots of sitting. make sure the calipers are lubed up and the hoses show no signs of cracking. also check the hard lines as the pass by the gas tank. it's where rust generally forms first and pops them.