Is a classic relatively easy to work on..That depends on the year classic you get.
The older up to 88 have the lt230 (gears)transfer case. later the Borg Warner(viscous) Most people in the forums want the LT230 transfer case, as they feel it is stronger and like the ability to "lock" it's transfer case.
I have the Borg warner it works just fine for almost all offroading, The viscous was locked up and has been replaced twice, once with a used unit and once with a new rebuilt unit from Ashcroft Tansmissions in England.
These are not cheap. It still works fine. I did however just order a rebuilt LT230 transfer case. with a steel flange'd case ATB center diff, that is still lockable. $1650.00 with shipping to California. I will never need another one of these in my lifetime. My Borg Warner has 200,000 miles and is fully functional but the Drive chain has to be stretched and the input and output shafts have got to be near stripping. I have rebuilt the engine, installed top hat piston liners, 4 jet injectors, I could go in for a long time. Went thru 5 alternators... V belt engine but serpentine belt alternator....anyway
Up to 92 the electrical is the same except for they added options thru the years so It is all basically the same wiring with newer added things every year. In 93-94 they were prepping for the later model P38 and the discovery changes, so parts, electronic controls started to change slightly, air suspension was added, (mine is coils now with 2 inch lift) alternator changed, the addition of a very primitive OBD1, which shows trouble codes and engine management indications for throttle settings and stepper motor settings.(if you have the reader program and a serial connector that fits(80$) to hook to your laptop.
My 94 has so many relays and different added fuses, I have owned this for 7 years, I am still finding fuses not mentioned in service manuals. The (Second) fuse for the cigarette lighter is doubling as the heated seat fuse, hidden under the seat in small box that you find 5 fuses in.
I have never had any strange electrical issues! I bought one that was unmolested in anyway, stock stereo etc. I love the vehicle it looks like brand new with lift and skid plates and winch rack way more stuff to list. Would I recommend one of these to my family members..not unless they were the CEO of a company. I did all the work myself over 7 years found parts in other countries, I know where to buy parts in south Africa, Australia, and countries that have no trade agreement with us that have brand new parts for very cheap. You will become the parts research master of your area..
Finally if your looking for a Vehicle to work on you are at the top of the food chain...the computers are minimal, and seem to keep on going, me too as long as the money holds out...Yes I bought a brand new Pertronix distributor as the old one broke in two..lol Gotta love a Range Rover Classic. My kids will be happy their inheritance is sitting out in the Garage. lol But the computers they are fine.